diff --git a/src/EncCnvtrs/EncCnvtrs 2010.csproj b/src/EncCnvtrs/EncCnvtrs 2010.csproj
index b3e3938..00d67a9 100644
--- a/src/EncCnvtrs/EncCnvtrs 2010.csproj	
+++ b/src/EncCnvtrs/EncCnvtrs 2010.csproj	
@@ -309,6 +309,7 @@
     </EmbeddedResource>
     <EmbeddedResource Include="NetRegexAutoConfigDialog.resx">
       <DependentUpon>NetRegexAutoConfigDialog.cs</DependentUpon>
+      <SubType>Designer</SubType>
     </EmbeddedResource>
     <EmbeddedResource Include="ImplTypeList.resx">
       <DependentUpon>ImplTypeList.cs</DependentUpon>
diff --git a/src/EncCnvtrs/NetRegexAutoConfigDialog.Designer.cs b/src/EncCnvtrs/NetRegexAutoConfigDialog.Designer.cs
index 3aefd2a..daf553c 100644
--- a/src/EncCnvtrs/NetRegexAutoConfigDialog.Designer.cs
+++ b/src/EncCnvtrs/NetRegexAutoConfigDialog.Designer.cs
@@ -407,6 +407,7 @@ private void InitializeComponent()
             this.dataGridViewRegularExpressions.Size = new System.Drawing.Size(380, 160);
             this.dataGridViewRegularExpressions.TabIndex = 12;
             this.toolTip.SetToolTip(this.dataGridViewRegularExpressions, resources.GetString("dataGridViewRegularExpressions.ToolTip"));
+            this.dataGridViewRegularExpressions.CellContentClick += new System.Windows.Forms.DataGridViewCellEventHandler(this.dataGridViewRegularExpressions_CellContentClick);
             this.dataGridViewRegularExpressions.CellEndEdit += new System.Windows.Forms.DataGridViewCellEventHandler(this.dataGridViewRegularExpressions_CellEndEdit);
             this.dataGridViewRegularExpressions.CurrentCellDirtyStateChanged += new System.EventHandler(this.dataGridViewRegularExpressions_CurrentCellDirtyStateChanged);
             this.dataGridViewRegularExpressions.SelectionChanged += new System.EventHandler(this.dataGridViewRegularExpressions_SelectionChanged);
diff --git a/src/EncCnvtrs/NetRegexAutoConfigDialog.cs b/src/EncCnvtrs/NetRegexAutoConfigDialog.cs
index 9b6ed55..ed34f6a 100644
--- a/src/EncCnvtrs/NetRegexAutoConfigDialog.cs
+++ b/src/EncCnvtrs/NetRegexAutoConfigDialog.cs
@@ -384,21 +384,40 @@ private void linkLabelOpenQuickReference_LinkClicked(object sender, LinkLabelLin
         private int rowIndexFromMouseDown;
         private int rowIndexOfItemUnderMouseToDrop;
 
-        private void dataGridViewRegularExpressions_MouseDown(object sender, MouseEventArgs e)
+		private void dataGridViewRegularExpressions_MouseDown(object sender, MouseEventArgs e)
         {
-            // Get the index of the row to drag
-            rowIndexFromMouseDown = dataGridViewRegularExpressions.HitTest(e.X, e.Y).RowIndex;
-            if ((rowIndexFromMouseDown < 0) || (rowIndexFromMouseDown > dataGridViewRegularExpressions.Rows.Count - 2))
-                return;
-            System.Diagnostics.Debug.WriteLine($"Select row index: {rowIndexFromMouseDown}");
+			// Get the index of the row to drag
+			var hitTestInfo = dataGridViewRegularExpressions.HitTest(e.X, e.Y);
+			rowIndexFromMouseDown = hitTestInfo.RowIndex;
+			var columnIndex = hitTestInfo.ColumnIndex;
+
+			// make sure it's a valid row and column (don't process DragDrop for checkbox column
+			//	or it won't toggle the Enabled checkbox)
+			if ((rowIndexFromMouseDown < 0) || (rowIndexFromMouseDown > dataGridViewRegularExpressions.Rows.Count - 2) ||
+				(columnIndex < 0) || dataGridViewRegularExpressions.Columns[columnIndex] is DataGridViewCheckBoxColumn)
+			{
+				return;
+			}
 
-            if (rowIndexFromMouseDown != -1)
-            {
-                dataGridViewRegularExpressions.DoDragDrop(dataGridViewRegularExpressions.Rows[rowIndexFromMouseDown], DragDropEffects.Move | DragDropEffects.Copy);
-            }
-        }
+			System.Diagnostics.Debug.WriteLine($"Select row index: {rowIndexFromMouseDown}");
+
+			if ((rowIndexFromMouseDown != -1) && (e.Button == MouseButtons.Left))
+			{
+				dataGridViewRegularExpressions.DoDragDrop(dataGridViewRegularExpressions.Rows[rowIndexFromMouseDown], DragDropEffects.Move | DragDropEffects.Copy);
+			}
+		}
+
+		private void dataGridViewRegularExpressions_CellContentClick(object sender, DataGridViewCellEventArgs e)
+		{
+			// Toggle the checkbox value
+			var cell = dataGridViewRegularExpressions[e.ColumnIndex, e.RowIndex];
+			bool newValue = !(bool)(cell.Value ?? false); // Default to false if null
+			cell.Value = newValue;
+
+			controlChangedModified(null, null);
+		}
 
-        private void dataGridViewRegularExpressions_DragOver(object sender, DragEventArgs e)
+		private void dataGridViewRegularExpressions_DragOver(object sender, DragEventArgs e)
         {
             // Provide visual feedback during the drag operation
             Point clientPoint = dataGridViewRegularExpressions.PointToClient(new Point(e.X, e.Y));
@@ -428,6 +447,6 @@ private void dataGridViewRegularExpressions_DragDrop(object sender, DragEventArg
                 IsModified = true;
             }
         }
-    }
+	}
 }
 
diff --git a/src/EncCnvtrs/NetRegexAutoConfigDialog.resx b/src/EncCnvtrs/NetRegexAutoConfigDialog.resx
index 4581595..5f4c747 100644
--- a/src/EncCnvtrs/NetRegexAutoConfigDialog.resx
+++ b/src/EncCnvtrs/NetRegexAutoConfigDialog.resx
@@ -118,7 +118,7 @@
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
   <metadata name="toolTip.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>17, 165</value>
+    <value>635, 17</value>
   </metadata>
   <metadata name="ColumnEnabled.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
     <value>True</value>
@@ -139,10 +139,10 @@
     <value>17, 17</value>
   </metadata>
   <metadata name="fontDialog.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>17, 91</value>
+    <value>338, 17</value>
   </metadata>
   <metadata name="contextMenuRegexChars.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>17, 128</value>
+    <value>448, 17</value>
   </metadata>
   <metadata name="$this.TrayHeight" type="System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
     <value>68</value>