Switch the unit off.

Hold the “ENTER” key, while powering the unit 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.