@inc
Hello!
A GUI is planned, when the Hummingbird "backend" will run as a daemon. We are already working on it, right now.
At the moment you can see the information you need on the standard output, and rightly so! Hummingbird 1 "branch" must remain a light and stand alone binary with no graphic requirement of any kind.
If you need a GUI at the moment please run Eddie.
The problem you mention looks like a failure to DHE. Do you notice a similar problem with OpenVPN 2.x or not?
Kind regards