Factory Reset
You can reset the Ganymede by holding down buttons 1, 2, and 8 while plugging it in. Hold them until they change to the long-press color (about 1 second), release, and then the Ganymede will reset and be back to default configuration.
This does not clear any of the saved preset data, but does reset most of the configuration settings to their defaults. Most importantly, this resets the device IP address to 10.1.0.20 so that you can get back into the configuration site from any configuration state.