diff --git a/Program.cs b/Program.cs
index f4374a278..37f32bb9c 100644
--- a/Program.cs
+++ b/Program.cs
@@ -35,6 +35,7 @@ using System.Runtime.InteropServices;
 using System.ServiceModel;
 using System.ServiceModel.Description;
 using System.Threading;
+using MatterHackers.Agg;
 using MatterHackers.Agg.Platform;
 using MatterHackers.Agg.UI;
 using MatterHackers.MatterControl.DataStorage;
@@ -227,6 +228,9 @@ namespace MatterHackers.MatterControl
 			var (width, height) = RootSystemWindow.GetStartupBounds();
 
 			var systemWindow = Application.LoadRootWindow(width, height);
+
+			SingleWindowProvider.SetWindowTheme(Color.Black, 12, false, () => new Button("X", 0, 0), 3, Color.LightGray, Color.DarkGray);
+
 			systemWindow.ShowAsSystemWindow();
 		}
 
diff --git a/Submodules/agg-sharp b/Submodules/agg-sharp
index 2796678b1..6a7fde48c 160000
--- a/Submodules/agg-sharp
+++ b/Submodules/agg-sharp
@@ -1 +1 @@
-Subproject commit 2796678b199c420a596e523d5762a2370bc83154
+Subproject commit 6a7fde48cfbb15480629dee42a1272d3a3423fe1