Mine's on version 18.104.22.168 at the moment. On at least some of my computers it has created a couple of folders with what appears to be random data files from various programs. The program hasn't caused any problems on the computers I have it on. On a notebook the program itself wasn't going active (glitched along the way) so I reinstalled it and that fixed it.
I don't like the window that comes up to make sure I know of its existence, but I guess I can live with that in order to have the protection.