Can't change the settings of the game

Hi ! 

On my first launch on the game, I try to change a few settings to accomodate my AZERTY clipboard. I put "Q" to go left and "Z" to go up and I didn't get an error message to tell me those letters where already used. Launch a game with a friend without problem then realise quite quickly that something was off with my direction. I went back in my settings and realise that the letters where already used but I can't change anything anymore in all my settings. I can't even go out of the settings without "Escape". I can see the interaction because it change color when I click on something but it's useless. 

I try a few things already like uninstall/install but also delete client.ini which made me quit the fullscreen but still doesn't allow me to change any settings. 

If someone can help, I'll be glad.