I've been using the spider remote app and adding tones only to discover that I'd overwritten several presets. I tried the directions for resetting the V20, but they did not work I don't know if it was because mine is a MKII or what, but it simply did nothing, the altered presets were still there. Took a long shot and reverse updated to ver 1.00 then 1.01 and finally back to ver 2.00. It worked, I now have all my factory presets!!!