A friend of mine had a bug and we took some time to solve it.

His main user account name in windows is "Propriétaire".

So, when he launched the game and tried to play (it was three days before the 2D), he had a error message from the game,

telling that the game can't create the profile path.

So we tried to change his account name in windows but it doesn't change the first path in documents and settings.

Finally we had to make a new windows user without any "é" not "à" or "è" and so on to make him able to play.

Remark : Under "Propriétaire" account, the game didn't save any profile or game name.. logic, but we created the directory manually

and after this, the game managed to record this, but he still wasn't able to play (loading screen before the game neer stops).

The files were created but the game wasn't able to read them, or something like this.