After this new update, I can’t move my mouse anywhere on the Screen except in a rectangle in the upper left. I have been playing for years, now I can’t even select single Player to start the game because my mouse is stuck. I can’t get to the options button at the bottom of the screen To see if it is...

I have a problem trying to run the game on my new computer. I have the entire game and all the add-ons I bought years ago, but had to convert them to Steam, which I did, and I downloaded them thru steam. After I did, and ran the game I can barely see the screens, and so I tried to change the resolut...