We have received numerous e-mails about the game crashing a first launch on Windows, with a game version that is not up to date.
This crash has already been fixed in a patch, and if you're in this case, please check for updates. To do so, simply restart Steam.
In any case, please always send us the crash-report with your e-mail address: we'll then be able to tell you how to by-pass the issue if it's critical.
Thanks,
La Moustache Stutio.