You will have to use the Favorites list in order to get the Prog CH working.
Load a patch that you want to call up later. Go to a screen that is not Load/Save – for example, go to the Osc1 page.
Press on the Perform button or the central value encoder. This opens up the Favorites screen. Tap and hold an empty field to insert your current patch onto one of those fields. You can also use the Favorites function on the Load screen.
This device uses only to the entries in the Favorites lis when Prog CH messages are used. As soon as you have put the most needed patches there, you can call them up by MIDI.