Flux Worked Great on Ubuntu 14.4.5 - Suddenly Stopped

[shmupi]

Hello,

I have been using flux for several weeks and it has become indispensable to me. However, today suddenly it stopped working. I can change the lighting to the darkest setting (in places where it's dark now). It changes for a few seconds then goes back to full brightness. I tried reinstalling, restarting, pausing and unpausing, nothing works so far.

Any help would be greatly appreciated, thanks.