I'm always surprised that some people can spend a long time programming something, and then not write documentation. Guess they get a kick from programming, not from people actually using it.

I tried this addon briefly, no proper readme file (as opposed to a website never updated) explaining anything. Even the tooltips doesn't explain anything except repeat the text which is on the actual GUI

So now its deleted again, and I'm trying an addon with a readme file

Oh well, guess its what the author wanted.