Sorry to post in an unrelated post, but I've asked this question in your thread on XDA and not gotten a response, and the bug report link on your web page doesn't seem to do anything useful.
I've just installed the paid version of Lux on an LG G3. It works well, except for one problem which I don't see any work-around for, and renders it pretty much unacceptable for me.
My LG G3 dims the screen shortly before it's going to time-out and shut off. Prior to installing Lux, tapping the screen while it's dimmed would restore it to the previous brightness. After installing Lux, tapping the screen makes it only very slightly brighter, not nearly as bright as it was previously, and too dim to read comfortably. To get back to normal brightness, I have to let the screen shut off and turn it back on.
I hope there's some setting I'm missing, but if not I need to uninstall Lux, because this is too big an annoyance to accept. With Lux installed, my screen becomes harder to read, not easier.