I completely uninstalled f.lux 4.55, waited a few days, decided to try again, downloaded the current version (4.55) and installed it again. Here are my machine specs: f.lux 4.55 setting was "reduce eyestrain" ASUS laptop G751JY.202, 10-Sep-14 processor: Intel(R) Core(TM) i7-4710HQ CPU @ 2.50GHz 2.49GHZ RAM: 24.0GB 64-bit Windows 10 Home version 1709, OS build 16299.125, x64-based processor video card: NVIDIA GeForce GTX 980M, driver version And this is what I get when I close out of a virtual world program: https://gyazo.com/b64612448ebb7b0eb8919167c88841dd It's like that for a minute or so, then goes back to normal, and colour temperature resets to f.lux again. Seems it only happens with this one program, but it bugs the hell out of me. Any help?