Slight issue booting the game

[kopskey1]

I'm not sure if this is a result of the patch, (I'm almost sure it isn't) but I say this brought up in a different issue (But wasn't explored further) and I couldn't find anything on this anywhere else on the internet.
When I try to boot the game (from toy2.exe) or even setup.exe, it claims that the game is not properly installed and needs to be reinstalled. This even occurs on a fresh install, but does not occur if I launch the game from the installer after reinstalling it.
Any clue as to how I fix this? (Using an American copy BTW)

[MrPepka]

It was the same for me. It helped launch the game as an Administrator