Black Screen in Basic ME

When I try to load the Basic ME it'll first ask me if I wanna Make a New Map, Open an existing map or Quit. If I choose to make or open a new map It'll take me to a black screen. In other words the map doesn't load.
Anyone know what's going on?
Anyone know what's going on?

Army SROTC Cadet


Comments
What process do you follow to start the editor?
Does that menu bar in the screenshot actually work, or is the editor locked up?
Have you rebooted? Have you checked game file integrity in Steam?
I actually thought the Mission Editor was bugged and non-functional, but now mine works, so....?
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