I've heard back from the developer, and he's advised that this is more likely to be caused by the resolution settings. So can you go to the Documents folder for the game (Default: C:\Users\Your Username\Documents\My Games\BA2) then open the file called OPTIONS.TXT. The 3rd and 4th lines in this file...

Dear DKDOM,

I have downloaded and played most of your games except ARMOUR - GERMANS. It seems the link is incorrect and drop box is no longer working.

All your scenario are beautifully designed and thank you for sharing them.

Regards,

RC