Were in the files can I find the screenshots? There is no folder named "screenshots" that I can find. Maybe I'm doing something wrong? I've tried Print Screen and F12. Well Shift + F12, Airplane mode and F12 share a key.
If you're using steam go to the game's page in your library, there should be a 'screenshots' section to the right hand side of the screen, below the play button.
Click 'manage my screenshots' to show your media gallery, click 'show on disk' in the window it brings up to view the disk location.