I just bought the game on Steam sale today, and downloaded latest trainer dated 20.12.2013.
The trainer activates at menu as it should, but as soon as I enter a local game, the game crashes.
I have also tried to activate the trainer after entering the game, and it results in a shutdown of game as soon as I press F1 to activate.
It's probably just another update from the Developers, but I should mention that the trainer also says 14.12.2013 in lower part of the screen.
Just informing you about this problem, not expecting any updates, this year.
Merry X-Mas CH-People!
Yea its the wrong download link.