After a while where the soft did not even launch properly, he finally did ! But still... if i try to get into the Games Manager, it just shows a black screen, with nothing to pick and no textbox. Just a blackscreen...
Is there any solution?
Ok, at that point I would assume that there is a misconfiguration on your computer, or maybe you need to roll back your graphics card driver due to a bug, or .net on your computer is out of wack. I'm not sure what to say since I don't have access to your computer. I would recommend having someone look at it though.
At that point I would guess your graphics card drivers or cards themselves have a bug in them. You aren't running on parallels or vmware or virtual box or wine are you?
Ok, then you most likely need to update your graphics card drivers.
Could you provide more information about your computer?