No documentation, I don't believe. You should read through the Hubigraph thread. It's a community developed app by @thomas.c.howard so for him it'as a hobby and writing documentation is a whole new can of worms, which he probably doesn't want to deal with. I think the first post is probably about all your going to get on that front. Read his FAQ in the first post.
He has been absent in the thread lately so I am guessing he is taking a break or has much more pressing issues to deal with.
