Test Error

[LOO-E]

Out of nowhere, LAMP has decided to stop working with the following tilesets when you attempt to test ROM with them selected:

Caves 2, Mid Acid, Full Acid, Caves 3, No Acid, Mid Acid, Full Acid and Queen

The error dialogue box will say "Unhandled exception has occurred in your application. If you click Continue (does nothing), the application will ignore this error and attempt to continue. If you click Quit, the application will close immediately. InvalidArgument=Value of '15' is not valid for 'SelectedIndex'. (Parameter 'value') Actual value was 15."

Depending what tileset you have selected, the value will be different, but Caves 2, Mid Acid will say 10, and will go up to 15 with the Queen tileset.

I've not done anything to break it afaik, but here is the details the error dialogue gives me:

See the end of this message for details on invoking 
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.ArgumentOutOfRangeException: InvalidArgument=Value of '10' is not valid for 'SelectedIndex'. (Parameter 'value')
Actual value was 10.
   at System.Windows.Forms.ComboBox.set_SelectedIndex(Int32 value)
   at LAMP.Controls.Other.TilesetInput.SetTileset(Int32 TilesetIndex) in D:\Github\YAM2E\YAM2E\Controls\Other\TilesetInput.cs:line 90
   at LAMP.FORMS.TestRom.FillValues() in D:\Github\YAM2E\YAM2E\FORMS\TestRom.cs:line 74
   at LAMP.FORMS.TestRom..ctor(Save s, Boolean isSaveFile) in D:\Github\YAM2E\YAM2E\FORMS\TestRom.cs:line 26
   at LAMP.MainWindow.ctx_btn_test_here_Click(Object sender, EventArgs e) in D:\Github\YAM2E\YAM2E\FORMS\MainWindow.cs:line 1082
   at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
   at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ToolStrip.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, WM msg, IntPtr wparam, IntPtr lparam)

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************** JIT Debugging **************