I was going to say that I agree with christian but instead I do think twocables is absolutely correct. 1900K is more than enough if you really think about it.
Thank you for your reply. I have sent you an email again, but this time from my private account (haris at mustajbasi dot ch) to support@ and sales@. If you haven't received anything again, please do write me a private message so we can continue there.
f.lux is loading your monitor profile - you can see what it is in the "color management" control panel.
4.55 had a bug that didn't do this in fullscreen, but the right fix is to use a profile you actually like (not just for us to fail to load it sometimes like we were doing before).