Hi there @Jph782002
I am really sorry to have you find yourself in that situation.
As @Lucifer001 suggested, which I appreciate and thank them for and to which I'd like to add some more details and express it in the steps below:
Run the client as you have.
Click F2 button, which will open the console, which you may or may not be able to see in the current set resolution.
Type clean reg command and press enter.
The client will then close and upon starting it again it should be operating in the normal resolution of your computer.
I hope this helps. Let me know if you are still facing any issues as such.
Have a great day,
Fusionflair