Crash when loading up a PBEM save - Directory is not empty

[wham]

Friend of mine faced this issue as we played, and we couldn't figure it out. Apparently their computer may have shut down while a game turn was loaded, and after that they can no longer load up our multiplayer save to try and play the turn again.

The error message is below:

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

************** Exception Text **************
System.IO.IOException: The directory is not empty.

at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.Directory.DeleteHelper(String fullPath, String userPath, Boolean recursive, Boolean throwOnTopLevelDirectoryNotFound, WIN32_FIND_DATA& data)
at System.IO.Directory.Delete(String fullPath, String userPath, Boolean recursive, Boolean checkHost)
at WindowsApplication1.GameLoopMainWindowClass2.HandleMouseClick(Int32 x, Int32 y, Int32 b) in G:\VR\VRDevelopment\WindowsApplication1\GUI\Windows\NewWindows\Initial\GameLoopMainWindowClass2.vb:line 2011
at WindowsApplication1.GameLoopScreenClass2.HandleMouseClick(Int32 x, Int32 y, Int32 b) in G:\VR\VRDevelopment\WindowsApplication1\GUI\Screens\NewScreens\GameLoopScreenClass2.vb:line 54
at WindowsApplication1.Form1.Form1_Mousedown(Object sender, MouseEventArgs e) in G:\VR\VRDevelopment\WindowsApplication1\Form1.vb:line 1617
at System.Windows.Forms.Control.OnMouseDown(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at WindowsApplication1.ImmoveableForm.WndProc(Message& m) in G:\VR\VRDevelopment\WindowsApplication1\ImmoveableForm.vb:line 68
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)