HOW TO FIX RESOLUTION

If on game startup, main menu has its lower part cut off, what you have to do is:

Go to folder My Documents\My Games\Fall Weiss. There, select the file Settings.ini and open it (Notepad is enough). Inside, find the lines

ResolutionX = (number)
ResolutionY = (number)

and change these numbers to your screen resolution. Save the file and start the game. It will work normally now.