I have just installed the trial version of Flatboard. It actually uses very few resources. Now I wanted to create a forum that is only available to registered users. That doesn't work. All users can post. That is probably a bug, as I have already read. I think that when it is fixed, I would also buy the pro version.

It is currently not possible to make a forum that is only visible to registered users. But I will make note of that as a plugin for the future. Currently I'm really busy, but I get to that when I'm ready to go.