Nevyrmoore: Think I'm having some issues with the .net and XNA frameworks here. The game was working for a while, but from today, I get an error message whenever I try to play, which says "No suitable graphics card found. Unable to create the graphics device". Does anyone have any ideas on how to fix this? It's not just affecting this game, but also games like State of Decay, DLC Quest, and Super Amazing Wagon Adventure.

PC is running Windows 7 64-bit, using an AMD Radeon HD 6770. I'm playing version 2.2.0 (as before, trying to run 2.2.1 wouldn't work, but 2.2.0 would).