There's no known issues with the 32 bit version of the game, and I've just fired it up to check (the 32 bit executable, albeit on 64 bit windows) and it's working fine. I'd suggest redownloading the game in it's entirety to ensure it's not a download issue and make sure you're copying it to a fresh folder and not overwriting an old one. Also the 32bit executable has had some issues with antivirus software historically, so make sure your antivirus isn't intefering with it, you might need to add an exception.