I dont understand why the developer cant figure out how to simply enable a simple borderless windowed mode, or perhaps allow us to change the fullscreen resolution, but whatever.
I used Borderless Gaming, in order to remove the borders and fake a fullscreen mode, so the game can run at 1080p.
For those that dont know already, when enabling fullscreen, the game runs 1600x900, EVERY TIME, and this is why some people had problems with black screens, because their monitors probably dont support that resolution.
In any case, I suggest that everyone uses a 3rd party app to remove those borders, and disable fullscreen, unless of course 1600x900 is your monitor's native res.