diff --git a/BizHawk.Client.EmuHawk/config/PathConfig.cs b/BizHawk.Client.EmuHawk/config/PathConfig.cs
index 5aa83e44b3..65dfb317f3 100644
--- a/BizHawk.Client.EmuHawk/config/PathConfig.cs
+++ b/BizHawk.Client.EmuHawk/config/PathConfig.cs
@@ -23,7 +23,7 @@ namespace BizHawk.Client.EmuHawk
 				return;
 			}
 
-			string[] coresToHide = { "VEC", "GB4x", "O2", "ChannelF", "AmstradCPC" };
+			string[] coresToHide = { "GB4x", "O2", "ChannelF", "AmstradCPC" };
 
 			foreach (var core in coresToHide)
 			{
diff --git a/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.Tastudio.cs b/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.Tastudio.cs
index b94febcffc..dd3d97ea8d 100644
--- a/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.Tastudio.cs
+++ b/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.Tastudio.cs
@@ -301,6 +301,7 @@ namespace BizHawk.Client.EmuHawk
 						}
 					}
 					_changeList.Clear();
+					Tastudio.Refresh();
 					Tastudio.JumpToGreenzone();
 					Tastudio.DoAutoRestore();
 				}
diff --git a/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.cs b/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.cs
index cb25e3a481..c88e2dd838 100644
--- a/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.cs
+++ b/BizHawk.Client.EmuHawk/tools/Lua/Libraries/EmuLuaLibrary.cs
@@ -73,7 +73,7 @@ namespace BizHawk.Client.EmuHawk
 						emuHawkLibrary.MainForm = _mainForm;
 					}
 
-					ApiHawkContainerInstance ??= InitApiHawkContainerInstance(serviceProvider, ConsoleLuaLibrary.LogOutput);
+					ApiHawkContainerInstance = InitApiHawkContainerInstance(serviceProvider, ConsoleLuaLibrary.LogOutput);
 					if (instance is DelegatingLuaLibraryEmu dlgInstanceEmu) dlgInstanceEmu.APIs = ApiHawkContainerInstance; // this is necessary as the property has the `new` modifier
 					else if (instance is DelegatingLuaLibrary dlgInstance) dlgInstance.APIs = ApiHawkContainerInstance;
 
diff --git a/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.ListView.cs b/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.ListView.cs
index c40e52060f..418f0b9b28 100644
--- a/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.ListView.cs
+++ b/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.ListView.cs
@@ -24,6 +24,7 @@ namespace BizHawk.Client.EmuHawk
 		private bool _selectionDragState;
 		private bool _suppressContextMenu;
 		private int _startRow;
+		private int _paintingMinFrame = -1;
 
 		// Editing analog input
 		private string _floatEditColumn = "";
@@ -546,6 +547,7 @@ namespace BizHawk.Client.EmuHawk
 			if (e.Button == MouseButtons.Left)
 			{
 				_leftButtonHeld = true;
+				_paintingMinFrame = frame;
 
 				// SuuperW: Exit float editing mode, or re-enter mouse editing
 				if (FloatEditingMode)
@@ -785,6 +787,7 @@ namespace BizHawk.Client.EmuHawk
 			_startSelectionDrag = false;
 			_startBoolDrawColumn = "";
 			_startFloatDrawColumn = "";
+			_paintingMinFrame = -1;
 			TasView.ReleaseCurrentCell();
 
 			// Exit float editing if value was changed with cursor
@@ -839,7 +842,7 @@ namespace BizHawk.Client.EmuHawk
 						// So now we have to ensure that all the edited frames are invalidated
 						if (CurrentTasMovie.LastEditedFrame < Emulator.Frame)
 						{
-							GoToFrame(CurrentTasMovie.LastEditedFrame);
+							GoToFrame(_paintingMinFrame);
 						}
 					}
 
@@ -948,6 +951,11 @@ namespace BizHawk.Client.EmuHawk
 				return;
 			}
 
+			if (_paintingMinFrame >= 0)
+			{
+				_paintingMinFrame = Math.Min(_paintingMinFrame, e.NewCell?.RowIndex ?? 0);
+			}
+
 			// skip rerecord counting on drawing entirely, mouse down is enough
 			// avoid introducing another global
 			bool wasCountingRerecords = CurrentTasMovie.IsCountingRerecords;
diff --git a/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.MenuItems.cs b/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.MenuItems.cs
index 1d2e1ca1c8..ef00859d77 100644
--- a/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.MenuItems.cs
+++ b/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.MenuItems.cs
@@ -736,11 +736,12 @@ namespace BizHawk.Client.EmuHawk
 			if (TasView.AnyRowsSelected)
 			{
 				var framesToInsert = TasView.SelectedRows;
-				var insertionFrame = Math.Min(TasView.LastSelectedIndex ?? 0 + 1, CurrentTasMovie.InputLogLength);
+				var insertionFrame = Math.Min((TasView.LastSelectedIndex ?? 0) + 1, CurrentTasMovie.InputLogLength);
 				var needsToRollback = TasView.FirstSelectedIndex < Emulator.Frame;
 
 				var inputLog = framesToInsert
-					.Select(frame => CurrentTasMovie.GetInputLogEntry(frame));
+					.Select(frame => CurrentTasMovie.GetInputLogEntry(frame))
+					.ToList();
 
 				CurrentTasMovie.InsertInput(insertionFrame, inputLog);
 
diff --git a/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.cs b/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.cs
index 9dfacf5a23..4361a727ee 100644
--- a/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.cs
+++ b/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.cs
@@ -462,6 +462,11 @@ namespace BizHawk.Client.EmuHawk
 
 			TasView.AllColumns.ColumnsChanged();
 
+			SetupBoolPatterns();
+		}
+
+		private void SetupBoolPatterns()
+		{
 			// Patterns
 			int bStart = 0;
 			int fStart = 0;
@@ -529,6 +534,7 @@ namespace BizHawk.Client.EmuHawk
 			MainForm.SetMainformMovieInfo();
 			Global.MovieSession.ReadOnly = true;
 			SetSplicer();
+			SetupBoolPatterns();
 		}
 
 		#endregion
diff --git a/Version/VersionInfo.cs b/Version/VersionInfo.cs
index 8ac9cfc88f..f34606d2fb 100644
--- a/Version/VersionInfo.cs
+++ b/Version/VersionInfo.cs
@@ -3,8 +3,8 @@ using System.IO;
 internal static class VersionInfo
 {
 	// keep this updated at every major release
-	public const string Mainversion = "2.3.3"; // Use numbers only or the new version notification won't work
-	public static readonly string RELEASEDATE = "January 12, 2019";
+	public const string Mainversion = "2.4.0"; // Use numbers only or the new version notification won't work
+	public static readonly string RELEASEDATE = "January 18, 2020";
 	public static readonly bool DeveloperBuild = true;
 	public static readonly string HomePage = "http://tasvideos.org/BizHawk.html";