Here is a link to the update.

My general view was that it (f.lux) didn't make a noticeable change (I wasn't recording sleep data at the time though. I am now.), but that the cost was so low (about 2 minutes of time) that it was still worth it for people to try.

The sleep aid I had started out trying gave me headaches. I use melotonin now, and it is much better. Still don't manage to get to bed before 1a though.