I was using Hamachi with the Quamachi GUI to connect to remote computers. But I am very unhappy with the new version and the restrictions.
Happily I found a free open source alternative NeoRouter, I now have total control of my VPN lol! it works great for my needs remote controlling many Windows comps.
I have been looking into designing my own GUI with the Qt Designer and my only confusion is how to link the (NeoRouter Service) nrservice and (NeoRouter client cli) nrclientcmd to my app so I can display the info it hands out and input command options.