Sorry to maybe sound silly but why? I've used it, it didn't feel good (my eyes kind of hurt) so I removed it. I see you're enthusiastic about it, what other benefits does it have if you don't mind me asking?
You have to adjust the settings. I'm using 5900K for day and 4600K for evening. I like it because it makes the screen more bearable especially during late evening hours.
I'm surprised of how few people even in our industry know about it. There hasn't been a single case where I show it to someone and he/she wasn't impressed. I'm so accustomed to using it that if for some reason it stopped working I believe my productivity would suffer at least 40%. Especially for those long winter hours it's a life saving app.
Where's the damn donate button?