Platform: Mac OSX - El Capitan version 10.11.6

Reproduce:

1. Open Gearend for the first time
2. Go into options and enable fullscreen
3. Apply settings
4. Close the game and reopen

Problem: The game is not in fullscreen anymore (windowed mode), but the options menu says that fullscreen is enabled. Toggling fullscreen to off then to on, puts the game back into fullscreen.

I just fixed this in the last update. Thanks!