OT: I used flux ages ago. You seem still to be active since you intro'd yourself als the flux guy. Out of curiosity, why should anyone still use flux nowadays when all OSes have time-based red-shifting built-in?
A greater deal of blue filtering was available on f.lux last time I used it. Unfortunately since it did not allow for setting hours other than the local sunrise and sunset times, it wasn't useful to someone like me that suffers light exposure insomnia during the months with longer daylight hours. Even though my home has been setup to accommodate this, f.lux, at least last time I used it, would not. The built in feature in my OS happily lets me choose for myself when to filter blue instead of denying me that choice.
It sounds like you've moved on so this likely isn't useful, but f.lux lets you override the GPS coordinates, so you could likely just negate your latitude to shift to your location's winter schedule.