Are you trying to access more than the five onboard presets without EDM?
…because that is not possible unless you select them from within the software’s preset list or you send program changes via MIDI. If so, I apologize for misunderstanding this whole time. But, it’s NOT possible to search through more than the five onboard presets from the front panel.
Use MIDI TTL when you’re using a 5-pin DIN to TRS converter box.
Use MIDI OPTO when you’re using a MIDI controller that has TRS MIDI capabilities directly from a TRS output.