This is how:
- If the unit is on, switch it off,
- Hold the "ENTER" key, while powering back on, and the following appears in the display: "D-TWO 1.06 Front 1.6",
- Choose the menu item "Reset sys param ?",
- Press "ENTER", and wait a few seconds. Now the display should read "Clear/reset done",
- Power off the D-Two, and then back on. If the operation was successful, the display will read "> Kernel Cleared <".
Please note, that resetting the unit does NOT delete your user presets.