Fix for game crash on full screen for some people

First method
- go to /system folder of the game and start directly buildmorecubes.exe file.
That should fix the problem.
Just for now you must start the game directly from buildmorecubes.exe and NOT by its steam icon.

OR

Second method
Just find "buildmorecubes.exe" in /system folder of the game and set it to "run as administrator".
That also should fix the problem.