...i click on the championship option in the main menu. i don't know why as ive never had this problem before. im on steam version of race07 as well just so people know.
I'm just guessing here, but I'd let Steam check the game files' integrity (should be an option in the game's proprties). If that doesn't help, you might wanna try to delete the files in \Steam\SteamApps\common\race 07\GameData\Championships\Official and then let it check again - it should now re-download those files. However, this might delete your running championships as I'm not sure where those are saved at