diff --git a/SabreTools.Helper/Dats/Partials/DatFile.ConvertUpdate.cs b/SabreTools.Helper/Dats/Partials/DatFile.ConvertUpdate.cs
index 5d37b860..9d10480a 100644
--- a/SabreTools.Helper/Dats/Partials/DatFile.ConvertUpdate.cs
+++ b/SabreTools.Helper/Dats/Partials/DatFile.ConvertUpdate.cs
@@ -28,7 +28,7 @@ namespace SabreTools.Helper.Dats
 		/// <param name="outDir">Optional param for output directory</param>
 		/// <param name="merge">True if input files should be merged into a single file, false otherwise</param>
 		/// <param name="diff">Non-zero flag for diffing mode, zero otherwise</param>
-		/// <param name="inplace">True if the cascade-diffed files should overwrite their inputs, false otherwise</param>
+		/// <param name="inplace">True if the output files should overwrite their inputs, false otherwise</param>
 		/// <param name="skip">True if the first cascaded diff file should be skipped on output, false otherwise</param>
 		/// <param name="bare">True if the date should not be appended to the default name, false otherwise [OBSOLETE]</param>
 		/// <param name="clean">True to clean the game names to WoD standard, false otherwise (default)</param>
@@ -77,7 +77,7 @@ namespace SabreTools.Helper.Dats
 			// Otherwise, loop through all of the inputs individually
 			else
 			{
-				Update(inputPaths, outDir, clean, remUnicode, descAsName, filter, splitType, trim, single, root);
+				Update(inputPaths, outDir, inplace, clean, remUnicode, descAsName, filter, splitType, trim, single, root);
 			}
 			return;
 		}
@@ -461,7 +461,7 @@ namespace SabreTools.Helper.Dats
 		/// <param name="outDir">Optional param for output directory</param>
 		/// <param name="merge">True if input files should be merged into a single file, false otherwise</param>
 		/// <param name="diff">Non-zero flag for diffing mode, zero otherwise</param>
-		/// <param name="inplace">True if the cascade-diffed files should overwrite their inputs, false otherwise</param>
+		/// <param name="inplace">True if the output files should overwrite their inputs, false otherwise</param>
 		/// <param name="skip">True if the first cascaded diff file should be skipped on output, false otherwise</param>
 		/// <param name="bare">True if the date should not be appended to the default name, false otherwise [OBSOLETE]</param>
 		/// <param name="clean">True to clean the game names to WoD standard, false otherwise (default)</param>
@@ -472,7 +472,7 @@ namespace SabreTools.Helper.Dats
 		/// <param name="trim">True if we are supposed to trim names to NTFS length, false otherwise</param>
 		/// <param name="single">True if all games should be replaced by '!', false otherwise</param>
 		/// <param name="root">String representing root directory to compare against for length calculation</param>
-		public void Update(List<string> inputFileNames, string outDir, bool clean, bool remUnicode, bool descAsName,
+		public void Update(List<string> inputFileNames, string outDir, bool inplace, bool clean, bool remUnicode, bool descAsName,
 			Filter filter, SplitType splitType, bool trim, bool single, string root)
 		{
 			Parallel.ForEach(inputFileNames, Globals.ParallelOptions, inputFileName =>
@@ -483,6 +483,12 @@ namespace SabreTools.Helper.Dats
 					inputFileName = Path.GetFullPath(inputFileName);
 				}
 
+				// If inplace is set, override the output dir
+				if (inplace)
+				{
+					outDir = Path.GetDirectoryName(inputFileName);
+				}
+
 				if (File.Exists(inputFileName))
 				{
 					DatFile innerDatdata = new DatFile(this);
diff --git a/SabreTools.Helper/README.1ST b/SabreTools.Helper/README.1ST
index e7305772..a919eff3 100644
--- a/SabreTools.Helper/README.1ST
+++ b/SabreTools.Helper/README.1ST
@@ -1023,10 +1023,6 @@ Options:
 				leaves the files that are not in one of the previous DATs. This can allow for
 				the creation of rollback sets or even just reduce the amount of duplicates 
 				across multiple sets
-				
-				-ip, --inplace		Enable inplace, cascaded diff
-					This will overwrite the source files instead of writing them out to the
-					program folder by default (or the output folder if overridden)
 					
 				-sf, --skip		Skip output of first DAT
 					In times where the first DAT does not need to be written out a second time,
@@ -1102,6 +1098,11 @@ Options:
 			This sets an output folder to be used when the files are created. If a path
 			is not defined, the application directory is used instead.
 			
+		-ip, --inplace		Enable overwriting in the source file
+			This will overwrite the source files instead of writing them out to the runtime folder
+			by default (or the output folder if overridden). Note that this only works for
+			regular updates and cascaded diffs due to how file are expected to be written.
+			
 		-mt={4}			Amount of threads to use
 			Optionally, set the number of threads to use for the multithreaded operations.
 			The default is 4 threads; -1 means unlimited threads created. If the user specifies