Game applying FLUX settings on start up, even when Flux is off

I use Flux a lot, something in KC:D deliverance is squiffy, and Flux doesnt recognise it as a Full screen app. So I have taken to diabling Flux.

However even with Flux NOT RUNNING, when I start KC:D it dims my screen to the same settings FLUX would, like it remembers what the FLUX setting was from when it ran both previously.

WTF is going on?