When I try to check the option from Fullscreen to Windowed, it does nothing, and then neither the Fullscreen or Windowed option is checked. Not sure if this is just on my end, so if someone could confirm that this is an actually bug and not just my computer being dumb, please let me know. Also, when I check Windowed mode, a black box with text in it appears in the upper right corner, and it doesn't go away until I log out and log back in.