FOUND IT thank you so much man, i can play my favourite game <3

Im on a mac where is this?

Hello,
I set the GUI scale to full and pressed enter. This was the biggest mistake of my life.
I now cannot extend the window enough to be able to press the enter button when changing the GUI scale back to normal!
I have tried reinstalling about 3 times, but it keeps the same settings! :(

Please ...