It backs up automatically!
To restore, navigate to the "Archive" tab in the main window. Select the archive you want based on version and time.
It's really a great feature. At first I under-appreciated it, but one day when the power went out, it corrupted my setup. I lost everything. Oh no! But wait, less than a minute later I was up and running again by restoring from one of the archives. UniTrunker sure had us in mind when designing this great software. Excellent!