I just realized that if i setup my uplay in to "ALWAYS OFFLINE" i can play this game just fine. If you want to be doublesure disable your internet connection completely so it doesn't have any connection to ubisoft servers.
Been playing two days without any problems without connection to ubisoft servers.
-No "Game outdated" -errors
-No game crashing every 1-3minutes
Bonus feature without internet connection +5-15FPS !!!!!! (unbelievable but at least true for me! Good coding skills ubisoft

)
Hopefully works for everyone
PS . Activate "always offline" from uplay -> close uplay -> start game from the game folder (wherever you installed it GRW.exe)
This is not acceptable thought since it should be CO-OP game.