Hello!
Everything is fine now.
But I don't know why^^
I've re-installed the game in the default directory. And when I started the game, I only got a fine strait line in the middle of the screen? Then I close it with the close option in the task bar...and the game start after.
I don't know why, but now it's ok. I get the right windows now when I start the game, the one with the option Plat now or Purchase Full version.
Thanks!