diff --git a/SabreTools.Library/DatFiles/DatHeader.cs b/SabreTools.Library/DatFiles/DatHeader.cs
index 17f1670f..f5e8a45e 100644
--- a/SabreTools.Library/DatFiles/DatHeader.cs
+++ b/SabreTools.Library/DatFiles/DatHeader.cs
@@ -220,6 +220,7 @@ namespace SabreTools.Library.DatFiles
         /// <summary>
         /// System
         /// </summary>
+        /// <remarks>Known as "plugin" in RomCenter</remarks>
         [JsonProperty("system")]
         public string System { get; set; }
 
diff --git a/SabreTools.Library/DatFiles/RomCenter.cs b/SabreTools.Library/DatFiles/RomCenter.cs
index 31928453..19980fe0 100644
--- a/SabreTools.Library/DatFiles/RomCenter.cs
+++ b/SabreTools.Library/DatFiles/RomCenter.cs
@@ -124,7 +124,7 @@ namespace SabreTools.Library.DatFiles
                     continue;
                 }
 
-                // Get all credits items (ONLY OVERWRITE IF THERE'S NO DATA)
+                // Get all credits items
                 switch (kvp?.Key.ToLowerInvariant())
                 {
                     case "author":
@@ -199,7 +199,7 @@ namespace SabreTools.Library.DatFiles
                     continue;
                 }
 
-                // Get all dat items (ONLY OVERWRITE IF THERE'S NO DATA)
+                // Get all dat items
                 switch (kvp?.Key.ToLowerInvariant())
                 {
                     case "version":
@@ -207,6 +207,7 @@ namespace SabreTools.Library.DatFiles
                         break;
 
                     case "plugin":
+                        Header.System = (Header.System != null ? kvp?.Value : Header.System);
                         reader.ReadNextLine();
                         break;
 
@@ -473,6 +474,7 @@ namespace SabreTools.Library.DatFiles
 
                 iw.WriteSection("DAT");
                 iw.WriteKeyValuePair("version", "2.50");
+                iw.WriteKeyValuePair("plugin", Header.System);
                 iw.WriteKeyValuePair("split", Header.ForceMerging == ForceMerging.Split ? "1" : "0");
                 iw.WriteKeyValuePair("merge", Header.ForceMerging == ForceMerging.Full || Header.ForceMerging == ForceMerging.Merged ? "1" : "0");
 
diff --git a/SabreTools.Library/DatFiles/SeparatedValue.cs b/SabreTools.Library/DatFiles/SeparatedValue.cs
index 0885aa88..69466cbc 100644
--- a/SabreTools.Library/DatFiles/SeparatedValue.cs
+++ b/SabreTools.Library/DatFiles/SeparatedValue.cs
@@ -793,6 +793,7 @@ namespace SabreTools.Library.DatFiles
                 #region OfflineList
 
                 case "system":
+                case "plugin":
                     return "DatFile.System";
 
                 case "screenshotwidth":