I like to (using the Edit software-USB connected to the HD500) go to a basic preset and experiment...add/change an amp, add/change effects, whatever.  I do this to learn about the Edit software and HD500's cababilites.  After experimenting, I DO NOT want to save the changes and just go back to my original preset.  How can I do this???  I don't see an "exit" type button...changing presets then going back does not do it...I still see all my "experimental" changes.  There must be an easy way to "not save" my changes and go back to the original preset.  Thanks for indulging this "dumb" question!