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).

Up.

Some help would be appreciated.

Alt+Shift+End

Are you seeing anything at all? The intended appearance is mostly red and black with a "photo negative" appearance, just like a photographer's darkroom.

I wonder if the location wasn't actually set in the first install? There should not be much difference after upgrading.

@johnedwa I understand that, but what's with the sudden drop even though I have the 60 minute slow change enabled? Or the weird dip during the day?

Are those simply the result of the whole thing "breaking down" like you said?

@crazydef After some tests, for 10.50E, 55.30N is max you can set without curve being broken. So, it breaks only far from equator ;)
Also, hello from 59.9 N :)

Turn off Microsoft Night Light.

Can confirm this morning all working OK with 3 screens and F.lux 4.74!

Only 25 GDI Objects in use! Thanks!