I am unable to start the game (through Steam or by directly executing the .exe). It displays a small 'DiRT Rally' popup for about 0.1s, after which it disappears, and nothing else happens (there is no drt.exe process running or anything). I have tried verifying the game cache through Steam. Following the readme supplied with the game, I have also tried starting the game with the launch parameter -safemode, but to no avail.