When I clicked "full screen" in the options my screen blacked out and I couldn't get back in

Put the summary of the bug you're having here

What I expected to happen was...:
For the screen to become bigger
What actually happened was...:
The screen went black and the game stoped working

Steps to Reproduce:
1. Go into options
2. ...Click into settings
3. ... If the full screen button says "off" then click on it