Using Windows 8.1, f.lux 4.104. Frequently when switching the active window, f.lux will disable itself, and then re-enable itself. Sometimes it even pops up a message saying f.lux is disabled for Firefox or for Notepad, even though I don't have those options checked. I can trigger it fairly reliably by dragging jpg files from Windows Explorer into Chrome tabs, it might do it 10% of the time.
Alright so I'm setup to run a few T5 bulbs and I've decided on the following color spectrum: https://www.atinorthamerica.com/t5-bulbs/
I'm hoping that spike of green light will dampen some of the violet light and compensate for the lower amounts of aqua light. I'll update in a few weeks if this shifts my circadian rhythm as I don't get nearly the amount of light in the morning as my kitchen area does-- maybe I should sleep there!