1st things first, let’s get the pedal operational again, we’ll table the MIDI thing for now. Are you able to boot into Recovery Mode (boot while holding SELECT, PERFORM and first Quickknob)? If so, the pedal will appear as a mounted drive on your computer. Send us the logs that are there in the log folder.
Also, send us a screenshot of the finder/explorer window contents for H90 mounted as a drive in Recovery Mode.
