musst wahrscheinlich von Steam neu installieren lassen:
when v1.1 and dlc are released there are many changes to ac engine code so this will more than likely break any mods you have installed,
(wait for modders to update them)
also may break other in game functions too.
so what should you do?
simple
DO A CLEAN INSTALL
delete assetto corsa from steam,go to your install folder narmaly located here c/programmefilesx86/steam/steamapps/common/assetto corsa
after that back up your setups folder in your assetto corsa my documents folder then delete the assetto corsa folder.
after that simply download the latest version of ac and all should go well with no hickups
remember to drop your setups folder back into ac after you boot up the game and let it create a new folder.
i know most of you know this but for them that dont this will prevent many problems
if your internet is slow you should just remove all mods and then verify your game cache
like so...
1.Load Steam.
2.From the Library section, right-click on the game and select Properties from the menu.
3.Select the Local files tab and click the Verify integrity of game cache... button.
4.Steam will verify the game's files - this process may take several minutes.
CLEAN INSTALL IS BEST THOUGH
As johny below advises its also a good idea to back up your mods
some tracks may still work cars most likely will not as there is a new physics update too
once backed up
add them one at a time to test them