It's not that I need all the games to be in fullscreen mode, but why are the game windows so SMALL? I remember them being a lot bigger, so i didn't feel like I was playing a glorified mobile or tablet game.
Hmm, fullscreen mode is available through AFG+ but I don't think I remember any change in the size of the game windows otherwise, @Sakarian Outcast ...
@SakarianOutcast Did you recently get a new computer? If so, it may have a higher resolution than what you used to have, which would explain why the game windows appear smaller (they haven't changed size). Also, as Doombreed said, full screen is an AFG+ feature.
I don't know why but something that might help is to hold ctrl and scroll with the mouse wheel to zoom into the game window. Its not perfect but it gets the job done.