What resolution does this run at?

[puresrawp]

I'm already aware that there aren't any resolution options for this game but I need to know the resolution this game runs at for another reason. I'm running Windows 8.1 which has a very annoying flaw where fullscreen games running at a resolution different than the computer cause a memory leak. This causes my computer to continually give me memory messages which pull me out of the game. If I change my resolution to the same as the game though, then I can play it just fine.
So can anyone tell what resolution this is running at?