diff --git a/osrepodbmgr/ChangeLog b/osrepodbmgr/ChangeLog
index 7d784fc..a5ca089 100644
--- a/osrepodbmgr/ChangeLog
+++ b/osrepodbmgr/ChangeLog
@@ -1,3 +1,14 @@
+2017-04-23  Natalia Portillo  <claunia@claunia.com>
+
+	* Core.cs:
+	* Program.cs:
+	* MainWindow.cs:
+	* packages.config:
+	* osrepodbmgr.csproj:
+	* gtk-gui/gui.stetic:
+	* gtk-gui/MainWindow.cs:
+	  Added support for archives.
+
 2017-04-20  Natalia Portillo  <claunia@claunia.com>
 
 	* Core.cs:
diff --git a/osrepodbmgr/Core.cs b/osrepodbmgr/Core.cs
index 3b872c8..b4fce1d 100644
--- a/osrepodbmgr/Core.cs
+++ b/osrepodbmgr/Core.cs
@@ -31,6 +31,7 @@ using System.Diagnostics;
 using System.IO;
 using System.Text;
 using Ionic.Zip;
+using Newtonsoft.Json;
 
 namespace osrepodbmgr
 {
@@ -60,13 +61,20 @@ namespace osrepodbmgr
 
         public static void FindFiles()
         {
-            if(string.IsNullOrEmpty(MainClass.path))
+            string filesPath;
+
+            if(!string.IsNullOrEmpty(MainClass.tmpFolder) && Directory.Exists(MainClass.tmpFolder))
+                filesPath = MainClass.tmpFolder;
+            else
+                filesPath = MainClass.path;
+
+            if(string.IsNullOrEmpty(filesPath))
             {
                 if(Failed != null)
                     Failed("Path is null or empty");
             }
 
-            if(!Directory.Exists(MainClass.path))
+            if(!Directory.Exists(filesPath))
             {
                 if(Failed != null)
                     Failed("Directory not found");
@@ -74,7 +82,7 @@ namespace osrepodbmgr
 
             try
             {
-                MainClass.files = new List<string>(Directory.EnumerateFiles(MainClass.path, "*", SearchOption.AllDirectories));
+                MainClass.files = new List<string>(Directory.EnumerateFiles(filesPath, "*", SearchOption.AllDirectories));
                 MainClass.files.Sort();
                 if(Finished != null)
                     Finished();
@@ -96,7 +104,14 @@ namespace osrepodbmgr
                 long counter = 1;
                 foreach(string file in MainClass.files)
                 {
-                    string relpath = file.Substring(MainClass.path.Length + 1);
+                    string filesPath;
+
+                    if(!string.IsNullOrEmpty(MainClass.tmpFolder) && Directory.Exists(MainClass.tmpFolder))
+                        filesPath = MainClass.tmpFolder;
+                    else
+                        filesPath = MainClass.path;
+                    
+                    string relpath = file.Substring(filesPath.Length + 1);
                     if(UpdateProgress != null)
                         UpdateProgress(string.Format("Hashing file {0} of {1}", counter, MainClass.files.Count), null, counter, MainClass.files.Count);
                     FileStream fileStream = new FileStream(file, FileMode.Open, FileAccess.Read);
@@ -405,6 +420,13 @@ namespace osrepodbmgr
                 zf.CompressionMethod = CompressionMethod.Deflate;
                 zf.UseZip64WhenSaving = Zip64Option.AsNecessary;
 
+                string filesPath;
+
+                if(!string.IsNullOrEmpty(MainClass.tmpFolder) && Directory.Exists(MainClass.tmpFolder))
+                    filesPath = MainClass.tmpFolder;
+                else
+                    filesPath = MainClass.path;
+
                 int counter = 0;
                 foreach(string file in MainClass.files)
                 {
@@ -420,7 +442,7 @@ namespace osrepodbmgr
                     ze.CreationTime = fi.CreationTimeUtc;
                     ze.EmitTimesInUnixFormatWhenSaving = true;
                     ze.LastModified = fi.LastWriteTimeUtc;
-                    ze.FileName = file.Substring(MainClass.path.Length + 1);
+                    ze.FileName = file.Substring(filesPath.Length + 1);
 
                     //fs.Close();
 
@@ -565,5 +587,311 @@ namespace osrepodbmgr
             if(FinishedWithText != null)
                 FinishedWithText(versionProcess.StandardOutput.ReadToEnd().TrimEnd(new char[] { '\n' }));
         }
+
+        public static void OpenArchive()
+        {
+            if(!MainClass.unarUsable)
+            {
+                if(Failed != null)
+                    Failed("The UnArchiver is not correctly installed");
+                return;
+            }
+
+            if(!File.Exists(MainClass.path))
+            {
+                if(Failed != null)
+                    Failed("Specified file cannot be found");
+                return;
+            }
+
+            try
+            {
+                string unarFolder = Path.GetDirectoryName(Settings.Current.UnArchiverPath);
+                string extension = Path.GetExtension(Settings.Current.UnArchiverPath);
+                string unarfilename = Path.GetFileNameWithoutExtension(Settings.Current.UnArchiverPath);
+                string lsarfilename = unarfilename.Replace("unar", "lsar");
+                string lsarPath = Path.Combine(unarFolder, lsarfilename + extension);
+
+                Process lsarProcess = new Process();
+                lsarProcess.StartInfo.FileName = lsarPath;
+                lsarProcess.StartInfo.CreateNoWindow = true;
+                lsarProcess.StartInfo.RedirectStandardOutput = true;
+                lsarProcess.StartInfo.UseShellExecute = false;
+                lsarProcess.StartInfo.Arguments = string.Format("-j \"\"\"{0}\"\"\"", MainClass.path);
+                lsarProcess.Start();
+                string lsarOutput = lsarProcess.StandardOutput.ReadToEnd();
+                lsarProcess.WaitForExit();
+
+                long counter = 0;
+                string format = null;
+                JsonTextReader jsReader = new JsonTextReader(new StringReader(lsarOutput));
+                while(jsReader.Read())
+                {
+                    if(jsReader.TokenType == JsonToken.PropertyName && jsReader.Value != null && jsReader.Value.ToString() == "XADFileName")
+                        counter++;
+                    else if(jsReader.TokenType == JsonToken.PropertyName && jsReader.Value != null && jsReader.Value.ToString() == "lsarFormatName")
+                    {
+                        jsReader.Read();
+                        if(jsReader.TokenType == JsonToken.String && jsReader.Value != null)
+                            format = jsReader.Value.ToString();
+                    }
+                }
+
+                // TODO: Check if ZIP file contains Mac OS X metadata
+                MainClass.copyArchive = false;
+                MainClass.archiveFormat = format;
+                MainClass.noFilesInArchive = counter;
+
+                if(string.IsNullOrEmpty(format))
+                {
+                    if(Failed != null)
+                        Failed("File not recognized as an archive");
+                    return;
+                }
+
+                if(counter == 0)
+                {
+                    if(Failed != null)
+                        Failed("Archive contains no files");
+                    return;
+                }
+
+                if(Finished != null)
+                    Finished();
+            }
+            catch(Exception ex)
+            {
+                if(Debugger.IsAttached)
+                    throw;
+                if(Failed != null)
+                    Failed(string.Format("Exception {0}\n{1}", ex.Message, ex.InnerException));
+            }
+        }
+
+        public static void ExtractArchive()
+        {
+            if(!MainClass.unarUsable)
+            {
+                if(Failed != null)
+                    Failed("The UnArchiver is not correctly installed");
+                return;
+            }
+
+            if(!File.Exists(MainClass.path))
+            {
+                if(Failed != null)
+                    Failed("Specified file cannot be found");
+                return;
+            }
+
+            if(!Directory.Exists(Settings.Current.TemporaryFolder))
+            {
+                if(Failed != null)
+                    Failed("Temporary folder cannot be found");
+                return;
+            }
+
+            string tmpFolder = Path.Combine(Settings.Current.TemporaryFolder, Path.GetRandomFileName());
+
+            try
+            {
+                Directory.CreateDirectory(tmpFolder);
+            }
+            catch(Exception)
+            {
+                if(Debugger.IsAttached)
+                    throw;
+                if(Failed != null)
+                    Failed("Cannot create temporary folder");
+            }
+
+            try
+            {
+                MainClass.unarProcess = new Process();
+                MainClass.unarProcess.StartInfo.FileName = Settings.Current.UnArchiverPath;
+                MainClass.unarProcess.StartInfo.CreateNoWindow = true;
+                MainClass.unarProcess.StartInfo.RedirectStandardOutput = true;
+                MainClass.unarProcess.StartInfo.UseShellExecute = false;
+                MainClass.unarProcess.StartInfo.Arguments = string.Format("-o \"\"\"{0}\"\"\" -r -D -k hidden \"\"\"{1}\"\"\"", tmpFolder, MainClass.path);
+                long counter = 0;
+                MainClass.unarProcess.OutputDataReceived += (sender, e) =>
+                {
+                    counter++;
+                    if(UpdateProgress2 != null)
+                        UpdateProgress2("", e.Data, counter, MainClass.noFilesInArchive);
+                };
+                MainClass.unarProcess.Start();
+                MainClass.unarProcess.BeginOutputReadLine();
+                MainClass.unarProcess.WaitForExit();
+                MainClass.unarProcess.Close();
+
+                if(Finished != null)
+                    Finished();
+                
+                MainClass.tmpFolder = tmpFolder;
+            }
+            catch(Exception ex)
+            {
+                if(Debugger.IsAttached)
+                    throw;
+                if(Failed != null)
+                    Failed(string.Format("Exception {0}\n{1}", ex.Message, ex.InnerException));
+            }
+        }
+
+        public static void CopyArchive()
+        {
+            try
+            {
+                if(string.IsNullOrWhiteSpace(MainClass.dbInfo.developer))
+                {
+                    if(Failed != null)
+                        Failed("Developer cannot be empty");
+                    return;
+                }
+
+                if(string.IsNullOrWhiteSpace(MainClass.dbInfo.product))
+                {
+                    if(Failed != null)
+                        Failed("Product cannot be empty");
+                    return;
+                }
+
+                if(string.IsNullOrWhiteSpace(MainClass.dbInfo.version))
+                {
+                    if(Failed != null)
+                        Failed("Version cannot be empty");
+                    return;
+                }
+
+                // Check if repository folder exists
+                string destinationFolder = Settings.Current.RepositoryPath;
+                if(!Directory.Exists(destinationFolder))
+                    Directory.CreateDirectory(destinationFolder);
+                // Check if developer folder exists
+                destinationFolder = Path.Combine(destinationFolder, MainClass.dbInfo.developer);
+                if(!Directory.Exists(destinationFolder))
+                    Directory.CreateDirectory(destinationFolder);
+                // Check if product folder exists
+                destinationFolder = Path.Combine(destinationFolder, MainClass.dbInfo.product);
+                if(!Directory.Exists(destinationFolder))
+                    Directory.CreateDirectory(destinationFolder);
+                // Check if version folder exists
+                destinationFolder = Path.Combine(destinationFolder, MainClass.dbInfo.version);
+                if(!Directory.Exists(destinationFolder))
+                    Directory.CreateDirectory(destinationFolder);
+                if(!string.IsNullOrWhiteSpace(MainClass.dbInfo.languages))
+                {
+                    // Check if languages folder exists
+                    destinationFolder = Path.Combine(destinationFolder, MainClass.dbInfo.languages);
+                    if(!Directory.Exists(destinationFolder))
+                        Directory.CreateDirectory(destinationFolder);
+                }
+                if(!string.IsNullOrWhiteSpace(MainClass.dbInfo.architecture))
+                {
+                    // Check if architecture folder exists
+                    destinationFolder = Path.Combine(destinationFolder, MainClass.dbInfo.architecture);
+                    if(!Directory.Exists(destinationFolder))
+                        Directory.CreateDirectory(destinationFolder);
+                }
+                if(MainClass.dbInfo.oem)
+                {
+                    // Check if oem folder exists
+                    destinationFolder = Path.Combine(destinationFolder, "oem");
+                    if(!Directory.Exists(destinationFolder))
+                        Directory.CreateDirectory(destinationFolder);
+                }
+                if(!string.IsNullOrWhiteSpace(MainClass.dbInfo.machine))
+                {
+                    // Check if architecture folder exists
+                    destinationFolder = Path.Combine(destinationFolder, "for " + MainClass.dbInfo.machine);
+                    if(!Directory.Exists(destinationFolder))
+                        Directory.CreateDirectory(destinationFolder);
+                }
+
+                string destinationFile = "";
+                if(!string.IsNullOrWhiteSpace(MainClass.dbInfo.format))
+                    destinationFile += "[" + MainClass.dbInfo.format + "]";
+                if(MainClass.dbInfo.files)
+                {
+                    if(destinationFile != "")
+                        destinationFile += "_";
+                    destinationFile += "files";
+                }
+                if(MainClass.dbInfo.netinstall)
+                {
+                    if(destinationFile != "")
+                        destinationFile += "_";
+                    destinationFile += "netinstall";
+                }
+                if(MainClass.dbInfo.source)
+                {
+                    if(destinationFile != "")
+                        destinationFile += "_";
+                    destinationFile += "source";
+                }
+                if(MainClass.dbInfo.update)
+                {
+                    if(destinationFile != "")
+                        destinationFile += "_";
+                    destinationFile += "update";
+                }
+                if(MainClass.dbInfo.upgrade)
+                {
+                    if(destinationFile != "")
+                        destinationFile += "_";
+                    destinationFile += "upgrade";
+                }
+                if(!string.IsNullOrWhiteSpace(MainClass.dbInfo.description))
+                {
+                    if(destinationFile != "")
+                        destinationFile += "_";
+                    destinationFile += MainClass.dbInfo.description;
+                }
+                else if(destinationFile == "")
+                {
+                    destinationFile = "archive";
+                }
+
+                string destination = Path.Combine(destinationFolder, destinationFile) + ".zip";
+                if(File.Exists(destination))
+                {
+                    if(Failed != null)
+                        Failed("File already exists");
+                    return;
+                }
+
+                File.Copy(MainClass.path, destination);
+            }
+            catch(Exception ex)
+            {
+                if(Debugger.IsAttached)
+                    throw;
+                if(Failed != null)
+                    Failed(string.Format("Exception {0}\n{1}", ex.Message, ex.InnerException));
+            }
+            if(Finished != null)
+                Finished();
+        }
+
+        public static void RemoveTempFolder()
+        {
+            try
+            {
+                if(Directory.Exists(MainClass.tmpFolder))
+                {
+                    Directory.Delete(MainClass.tmpFolder, true);
+                    if(Finished != null)
+                        Finished();
+                }
+            }
+            catch(Exception ex)
+            {
+                if(Debugger.IsAttached)
+                    throw;
+                if(Failed != null)
+                    Failed(string.Format("Exception {0}\n{1}", ex.Message, ex.InnerException));
+            }
+        }
     }
 }
diff --git a/osrepodbmgr/MainWindow.cs b/osrepodbmgr/MainWindow.cs
index 8d41be4..285d42c 100644
--- a/osrepodbmgr/MainWindow.cs
+++ b/osrepodbmgr/MainWindow.cs
@@ -39,6 +39,9 @@ public partial class MainWindow : Window
     Thread thdCheckFiles;
     Thread thdAddFiles;
     Thread thdPackFiles;
+    Thread thdOpenArchive;
+    Thread thdExtractArchive;
+    Thread thdRemoveTemp;
     bool stopped;
     ListStore view;
 
@@ -356,6 +359,25 @@ public partial class MainWindow : Window
         chkUpgrade.Active = false;
         chkNetinstall.Active = false;
         chkSource.Active = false;
+
+        if(MainClass.tmpFolder != null)
+        {
+            btnStop.Visible = false;
+            prgProgress.Visible = true;
+            prgProgress.Text = "Removing temporary files";
+            thdPulseProgress = new Thread(() =>
+            {
+                Application.Invoke(delegate
+                {
+                    prgProgress.Pulse();
+                });
+                Thread.Sleep(10);
+            });
+            Core.Failed += RemoveTempFilesFailed;
+            Core.Finished += RemoveTempFilesFinished;
+            thdRemoveTemp = new Thread(Core.RemoveTempFolder);
+            thdRemoveTemp.Start();
+        }
     }
 
     public void UpdateProgress(string text, string inner, long current, long maximum)
@@ -393,30 +415,76 @@ public partial class MainWindow : Window
             thdPulseProgress.Abort();
             thdPulseProgress = null;
         }
+
         if(thdFindFiles != null)
         {
             thdFindFiles.Abort();
             thdFindFiles = null;
         }
+
         if(thdHashFiles != null)
         {
             thdHashFiles.Abort();
             thdHashFiles = null;
         }
+
         if(thdCheckFiles != null)
         {
             thdCheckFiles.Abort();
             thdCheckFiles = null;
         }
 
+        if(thdAddFiles != null)
+        {
+            thdAddFiles.Abort();
+            thdAddFiles = null;
+        }
+
+        if(thdPackFiles != null)
+        {
+            thdPackFiles.Abort();
+            thdPackFiles = null;
+        }
+
+        if(thdOpenArchive != null)
+        {
+            thdOpenArchive.Abort();
+            thdOpenArchive = null;
+        }
+
+        if(MainClass.unarProcess != null)
+        {
+            MainClass.unarProcess.Kill();
+            MainClass.unarProcess = null;
+        }
+
+        if(MainClass.tmpFolder != null)
+        {
+            btnStop.Visible = false;
+            prgProgress.Text = "Removing temporary files";
+            thdPulseProgress = new Thread(() =>
+            {
+                Application.Invoke(delegate
+                {
+                    prgProgress.Pulse();
+                });
+                Thread.Sleep(10);
+            });
+            Core.Failed += RemoveTempFilesFailed;
+            Core.Finished += RemoveTempFilesFinished;
+            thdRemoveTemp = new Thread(Core.RemoveTempFolder);
+            thdRemoveTemp.Start();
+        }
+        else
+            RestoreUI();
+    }
+
+    public void RestoreUI()
+    {
         lblProgress.Visible = false;
         prgProgress.Visible = false;
         lblProgress2.Visible = false;
         prgProgress2.Visible = false;
-        Core.Failed -= HashFilesFailed;
-        Core.Finished -= HashFilesFinished;
-        Core.UpdateProgress -= UpdateProgress;
-        Core.UpdateProgress2 -= UpdateProgress2;
         btnExit.Sensitive = true;
         btnFolder.Visible = true;
         btnArchive.Visible = true;
@@ -428,12 +496,65 @@ public partial class MainWindow : Window
         btnArchive.Visible = true;
         btnSettings.Sensitive = true;
         Core.Failed -= FindFilesFailed;
+        Core.Failed -= HashFilesFailed;
+        Core.Failed -= ChkFilesFailed;
+        Core.Failed -= OpenArchiveFailed;
+        Core.Failed -= AddFilesToDbFailed;
+        Core.Failed -= PackFilesFailed;
+        Core.Failed -= ExtractArchiveFailed;
+        Core.Failed -= RemoveTempFilesFailed;
         Core.Finished -= FindFilesFinished;
+        Core.Finished -= HashFilesFinished;
+        Core.Finished -= ChkFilesFinished;
+        Core.Finished -= OpenArchiveFinished;
+        Core.Finished -= AddFilesToDbFinished;
+        Core.Finished -= ExtractArchiveFinished;
+        Core.Finished -= RemoveTempFilesFinished;
+        Core.FinishedWithText -= PackFilesFinished;
+        Core.UpdateProgress -= UpdateProgress;
+        Core.UpdateProgress2 -= UpdateProgress2;
         btnStop.Visible = false;
         if(view != null)
             view.Clear();
     }
 
+    public void RemoveTempFilesFailed(string text)
+    {
+        Application.Invoke(delegate
+        {
+            MessageDialog dlgMsg = new MessageDialog(this, DialogFlags.Modal, MessageType.Error, ButtonsType.Ok, text);
+            dlgMsg.Run();
+            dlgMsg.Destroy();
+            if(thdPulseProgress != null)
+            {
+                thdPulseProgress.Abort();
+                thdPulseProgress = null;
+            }
+            Core.Failed -= RemoveTempFilesFailed;
+            Core.Finished -= RemoveTempFilesFinished;
+            MainClass.path = null;
+            MainClass.tmpFolder = null;
+            RestoreUI();
+        });
+    }
+
+    public void RemoveTempFilesFinished()
+    {
+        Application.Invoke(delegate
+        {
+            if(thdPulseProgress != null)
+            {
+                thdPulseProgress.Abort();
+                thdPulseProgress = null;
+            }
+            Core.Failed -= RemoveTempFilesFailed;
+            Core.Finished -= RemoveTempFilesFinished;
+            MainClass.path = null;
+            MainClass.tmpFolder = null;
+            RestoreUI();
+        });
+    }
+
     protected void OnBtnAddClicked(object sender, EventArgs e)
     {
         btnAdd.Sensitive = false;
@@ -576,8 +697,29 @@ public partial class MainWindow : Window
         MainClass.dbInfo.update = chkUpdate.Active;
         MainClass.dbInfo.upgrade = chkUpgrade.Active;
 
-        thdPackFiles = new Thread(Core.CompressFiles);
-        thdPackFiles.Start();
+        if(!string.IsNullOrEmpty(MainClass.tmpFolder) && MainClass.copyArchive)
+        {
+            thdPulseProgress = new Thread(() =>
+            {
+                Application.Invoke(delegate
+                {
+                    prgProgress.Pulse();
+                });
+                Thread.Sleep(10);
+            });
+            Core.UpdateProgress -= UpdateProgress;
+            Core.UpdateProgress2 -= UpdateProgress2;
+            prgProgress.Text = "Copying archive as is.";
+            prgProgress2.Visible = false;
+            lblProgress2.Visible = false;
+            thdPackFiles = new Thread(Core.CopyArchive);
+            thdPackFiles.Start();
+        }
+        else
+        {
+            thdPackFiles = new Thread(Core.CompressFiles);
+            thdPackFiles.Start();
+        }
     }
 
     public void PackFilesFinished(string text)
@@ -647,4 +789,182 @@ public partial class MainWindow : Window
             chkSource.Sensitive = true;
         });
     }
+
+    protected void OnBtnArchiveClicked(object sender, EventArgs e)
+    {
+        if(!MainClass.unarUsable)
+        {
+            MessageDialog dlgMsg = new MessageDialog(this, DialogFlags.Modal, MessageType.Error, ButtonsType.Ok, "Cannot open archives without a working unar installation.");
+            dlgMsg.Run();
+            dlgMsg.Destroy();
+            return;
+        }
+
+        FileChooserDialog dlgFolder = new FileChooserDialog("Open archive", this, FileChooserAction.Open,
+                                                     "Cancel", ResponseType.Cancel, "Open", ResponseType.Accept);
+        dlgFolder.SelectMultiple = false;
+
+        if(dlgFolder.Run() == (int)ResponseType.Accept)
+        {
+            stopped = false;
+            prgProgress.Text = "Opening archive";
+            lblProgress.Visible = false;
+            prgProgress.Visible = true;
+            btnExit.Sensitive = false;
+            btnFolder.Visible = false;
+            btnArchive.Visible = false;
+            btnSettings.Sensitive = false;
+            thdPulseProgress = new Thread(() =>
+            {
+                Application.Invoke(delegate
+                {
+                    prgProgress.Pulse();
+                });
+                Thread.Sleep(10);
+            });
+
+            thdOpenArchive = new Thread(Core.OpenArchive);
+            MainClass.path = dlgFolder.Filename;
+            Core.Failed += OpenArchiveFailed;
+            Core.Finished += OpenArchiveFinished;
+            btnStop.Visible = true;
+            thdPulseProgress.Start();
+            thdOpenArchive.Start();
+        }
+
+        dlgFolder.Destroy();
+    }
+
+    public void OpenArchiveFailed(string text)
+    {
+        Application.Invoke(delegate
+        {
+            if(!stopped)
+            {
+                MessageDialog dlgMsg = new MessageDialog(this, DialogFlags.Modal, MessageType.Error, ButtonsType.Ok, text);
+                dlgMsg.Run();
+                dlgMsg.Destroy();
+            }
+            if(thdPulseProgress != null)
+                thdPulseProgress.Abort();
+            lblProgress.Visible = false;
+            prgProgress.Visible = false;
+            btnExit.Sensitive = true;
+            btnFolder.Visible = true;
+            btnArchive.Visible = true;
+            btnSettings.Sensitive = true;
+            Core.Failed -= OpenArchiveFailed;
+            Core.Finished -= OpenArchiveFinished;
+            thdOpenArchive = null;
+        });
+    }
+
+    public void OpenArchiveFinished()
+    {
+        Application.Invoke(delegate
+        {
+            stopped = false;
+            prgProgress.Text = "Extracting archive";
+            lblProgress.Visible = false;
+            prgProgress.Visible = true;
+            prgProgress2.Visible = true;
+            btnExit.Sensitive = false;
+            btnFolder.Visible = false;
+            btnArchive.Visible = false;
+            btnSettings.Sensitive = false;
+            thdPulseProgress = new Thread(() =>
+            {
+                Application.Invoke(delegate
+                {
+                    prgProgress.Pulse();
+                });
+                Thread.Sleep(10);
+            });
+            Core.Failed -= OpenArchiveFailed;
+            Core.Finished -= OpenArchiveFinished;
+            thdOpenArchive = null;
+            Core.Failed += ExtractArchiveFailed;
+            Core.Finished += ExtractArchiveFinished;
+            Core.UpdateProgress2 += UpdateProgress2;
+            thdExtractArchive = new Thread(Core.ExtractArchive);
+            thdExtractArchive.Start();
+        });
+    }
+
+    public void ExtractArchiveFailed(string text)
+    {
+        Application.Invoke(delegate
+        {
+            if(!stopped)
+            {
+                MessageDialog dlgMsg = new MessageDialog(this, DialogFlags.Modal, MessageType.Error, ButtonsType.Ok, text);
+                dlgMsg.Run();
+                dlgMsg.Destroy();
+            }
+            if(thdPulseProgress != null)
+                thdPulseProgress.Abort();
+            lblProgress.Visible = false;
+            prgProgress2.Visible = false;
+            btnExit.Sensitive = true;
+            btnFolder.Visible = true;
+            btnArchive.Visible = true;
+            btnSettings.Sensitive = true;
+            Core.Failed -= ExtractArchiveFailed;
+            Core.Finished -= ExtractArchiveFinished;
+            Core.UpdateProgress2 -= UpdateProgress2;
+            thdExtractArchive = null;
+            if(MainClass.tmpFolder != null)
+            {
+                btnStop.Visible = false;
+                prgProgress.Text = "Removing temporary files";
+                thdPulseProgress = new Thread(() =>
+                {
+                    Application.Invoke(delegate
+                    {
+                        prgProgress.Pulse();
+                    });
+                    Thread.Sleep(10);
+                });
+                Core.Failed += RemoveTempFilesFailed;
+                Core.Finished += RemoveTempFilesFinished;
+                thdRemoveTemp = new Thread(Core.RemoveTempFolder);
+                thdRemoveTemp.Start();
+            }
+        });
+    }
+
+    public void ExtractArchiveFinished()
+    {
+        Application.Invoke(delegate
+        {
+            if(thdExtractArchive != null)
+                thdExtractArchive.Abort();
+            stopped = false;
+            lblProgress.Text = "Finding files";
+            lblProgress.Visible = true;
+            prgProgress.Visible = true;
+            btnExit.Sensitive = false;
+            btnFolder.Visible = false;
+            btnArchive.Visible = false;
+            btnSettings.Sensitive = false;
+            Core.Failed -= ExtractArchiveFailed;
+            Core.Finished -= ExtractArchiveFinished;
+            Core.UpdateProgress2 -= UpdateProgress2;
+            thdPulseProgress = new Thread(() =>
+            {
+                Application.Invoke(delegate
+                {
+                    prgProgress.Pulse();
+                });
+                Thread.Sleep(10);
+            });
+
+            thdFindFiles = new Thread(Core.FindFiles);
+            Core.Failed += FindFilesFailed;
+            Core.Finished += FindFilesFinished;
+            btnStop.Visible = true;
+            thdPulseProgress.Start();
+            thdFindFiles.Start();
+        });
+    }
 }
diff --git a/osrepodbmgr/Program.cs b/osrepodbmgr/Program.cs
index 530ea9a..79aded4 100644
--- a/osrepodbmgr/Program.cs
+++ b/osrepodbmgr/Program.cs
@@ -26,6 +26,7 @@
 //  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Threading;
 using Gtk;
 
@@ -40,6 +41,11 @@ namespace osrepodbmgr
         public static bool unarUsable;
         public delegate void UnarChangeStatusDelegate();
         public static event UnarChangeStatusDelegate UnarChangeStatus;
+        public static string tmpFolder;
+        public static long noFilesInArchive;
+        public static string archiveFormat;
+        public static Process unarProcess;
+        public static bool copyArchive;
 
         public static void Main(string[] args)
         {
@@ -65,6 +71,8 @@ namespace osrepodbmgr
             unarUsable = true;
             if(UnarChangeStatus != null)
                 UnarChangeStatus();
+            Core.Finished -= CheckUnarFinished;
+            Core.Failed -= CheckUnarFailed;
         }
 
         static void CheckUnarFailed(string text)
@@ -72,6 +80,8 @@ namespace osrepodbmgr
             unarUsable = false;
             if(UnarChangeStatus != null)
                 UnarChangeStatus();
+            Core.Finished -= CheckUnarFinished;
+            Core.Failed -= CheckUnarFailed;
         }
     }
 }
diff --git a/osrepodbmgr/gtk-gui/MainWindow.cs b/osrepodbmgr/gtk-gui/MainWindow.cs
index a6701ef..8bfb0ac 100644
--- a/osrepodbmgr/gtk-gui/MainWindow.cs
+++ b/osrepodbmgr/gtk-gui/MainWindow.cs
@@ -587,7 +587,6 @@ public partial class MainWindow
 		w51.Fill = false;
 		// Container child hbox1.Gtk.Box+BoxChild
 		this.btnArchive = new global::Gtk.Button();
-		this.btnArchive.Sensitive = false;
 		this.btnArchive.CanFocus = true;
 		this.btnArchive.Name = "btnArchive";
 		this.btnArchive.UseUnderline = true;
@@ -653,6 +652,7 @@ public partial class MainWindow
 		this.DeleteEvent += new global::Gtk.DeleteEventHandler(this.OnDeleteEvent);
 		this.btnStop.Clicked += new global::System.EventHandler(this.OnBtnStopClicked);
 		this.btnFolder.Clicked += new global::System.EventHandler(this.OnBtnFolderClicked);
+		this.btnArchive.Clicked += new global::System.EventHandler(this.OnBtnArchiveClicked);
 		this.btnAdd.Clicked += new global::System.EventHandler(this.OnBtnAddClicked);
 		this.btnPack.Clicked += new global::System.EventHandler(this.OnBtnPackClicked);
 		this.btnClose.Clicked += new global::System.EventHandler(this.OnBtnCloseClicked);
diff --git a/osrepodbmgr/gtk-gui/gui.stetic b/osrepodbmgr/gtk-gui/gui.stetic
index b9ae997..a6828c3 100644
--- a/osrepodbmgr/gtk-gui/gui.stetic
+++ b/osrepodbmgr/gtk-gui/gui.stetic
@@ -643,12 +643,12 @@
             <child>
               <widget class="Gtk.Button" id="btnArchive">
                 <property name="MemberName" />
-                <property name="Sensitive">False</property>
                 <property name="CanFocus">True</property>
                 <property name="Type">TextAndIcon</property>
                 <property name="Icon">stock:gtk-open Menu</property>
                 <property name="Label" translatable="yes">Open _archive</property>
                 <property name="UseUnderline">True</property>
+                <signal name="Clicked" handler="OnBtnArchiveClicked" />
               </widget>
               <packing>
                 <property name="PackType">End</property>
diff --git a/osrepodbmgr/osrepodbmgr.csproj b/osrepodbmgr/osrepodbmgr.csproj
index 852e089..fb237b2 100644
--- a/osrepodbmgr/osrepodbmgr.csproj
+++ b/osrepodbmgr/osrepodbmgr.csproj
@@ -59,6 +59,9 @@
     <Reference Include="DotNetZip">
       <HintPath>..\packages\DotNetZip.1.10.1\lib\net20\DotNetZip.dll</HintPath>
     </Reference>
+    <Reference Include="Newtonsoft.Json">
+      <HintPath>..\packages\Newtonsoft.Json.10.0.2\lib\net45\Newtonsoft.Json.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="gtk-gui\gui.stetic">
diff --git a/osrepodbmgr/packages.config b/osrepodbmgr/packages.config
index 503e7cc..4225d80 100644
--- a/osrepodbmgr/packages.config
+++ b/osrepodbmgr/packages.config
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="DotNetZip" version="1.10.1" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="10.0.2" targetFramework="net45" />
   <package id="plist-cil" version="1.15.0" targetFramework="net45" />
   <package id="System.Data.SQLite.Core" version="1.0.105.0" targetFramework="net45" />
 </packages>
\ No newline at end of file