I currently am running 1.40X GalCiv2. I have not purchased Dark Avatar yet. I tried installing 1.50, but the game stopped working. I couldn't even get to the main menu. The game runs fine with 1.40X loaded. When I downloaded 1.50 through Stardock Central my game stopped working. I figured maybe this version was for Dark Avatar. Are my assumptions correct? Am I doing something wrong? Any information would be appreciated.

Thanks for your time!