It appears the sandbox for store apps makes use of junctions, so the disk space used is much lower than it may initally appear. Even in the first screenshot of the thread, the actual allocated filesize on disk for "2.5 GB" of binaries is only 60 KB

This can be validated by checking the localcache folder size in explorer:

0_1563110062883_5d2fe997-6bd9-4aa5-9a18-5978d6b007ca-image.png

or by running "dir /al /s" from a cmd window in the localcache folder.

0_1563110491210_e8b6f552-b86f-4a07-8ebc-fbe794e40963-image.png

Note the parenthesis around the filesize, which represent a junction of some sort.

Thank you :)
I thought that option was about the colours, too. That solved it, of course.

@herf said in F.lux does not work suddenly:

AMD lists RX 560X as a laptop GPU - do you know if the second GPU is discrete (or vice-versa)? Maybe you can post what kind of machine this is, if there's any GPU/eGPU, & that might help.

The Windows color system is shifting around a lot -- HDR and 10-bit color, so I imagine we are seeing one case or another fail, but it is hard to see.

Also, it's possible that you could try "driver rollback" from the 2019/05/22 driver, and see if an earlier driver version works.

This is is laptop with rx560x as dedicated graphics and ryzen 2500u with vega 8 graphics

Yes this is built into the latest version - check the disable menu.

Usually this is due to video drivers - try updating drivers, or post f.lux options > driver info here.

Please turn off Windows Night Light.

now when I look at it I have this feeling that lowering gamma to minimum with QuickGamma makes colors washed out, but dark, but when I enable f.lux color are washed out but brightness goes way up

Getting the same issue with Dota Underlords.

"there is a feature that disables f.lux for fullscreen apps, so check if you've set it in f.lux's disable menu."

This was it, thank you so much!

I figured out the issue. Windows 10 has a new "feature" called "Fullscreen Optimizations", which forces every app into borderless windowed mode (!?!). This also explains why all of my games have been getting significantly worse performance since the update.

I haven't figured out a way to disable it globally (none of the suggestions online work), but you can disable it on a per-app basis by finding the executable, right-clicking --> properties --> compatibility --> "Disable Fullscreen Optimizations". After doing this, flux will disable correctly for that application.