I set the FM3 (using midi channel 2) Scene Change back to 34, so I have Preset 401, Scene 2 as:
Program Change 3 0 17
Control Change 34 1
Midi from Bandhelper to the FM3:
sending data [B1, 00, 03, B1, 20, 00, C1, 11] to all ports
sending data [B1, 22, 01] to all ports
received data [B1, 00, 03]...