F.lux change windows brightness

[Cloud Strifes Hunter]

Hi!
The problem is: M default color is : 22MP55.ICM
Windows 7 SP1 64bits.

When F.lux is not installed, the colors are beautiful.
When I install the f.lux, the screen in 6500k is more brightness than the default color manager....

Why?

Thanks a lot. :)

[lorna]

Did you possibly change your screen calibration without using a hardware calibrator?