Far Cry 3 Cheats
This isn't a trainer fault btw, were you playing the game and shut down your PC quickly or was shut down quickly? That can cause errors with files etc.
[Edited by 07blackhawks19, 12/6/2012 4:54:16 AM]
The only reason the game crashed when you pressed F1 is because the game is a different version than what the trainer was built for, maybe through an update etc, different region.
It seems like a corrupted file in your installation which is causing it not to start up.