What I did was put the pedal in MIDI mode with the BT Editor app, then set each of the pedals to match the CCs on the Quantiloop, then save them. After that I opened the Quantiloop app and entered directly to the MIDI command assignment and pressed the top “learn” button, then pressed and release the first pedal and it would instantly recognize it. This will change the configuration of the MIDI assignment to “Latching” and the “Hold Function” will disappear. Repeat the process for the rest of the pedals and put whatever option you want for each of them.
One thing that I noticed is that the Quantiloop does not actually identify the BT-4 in the MIDI bluetooth control selection, as it does with the Blueboard, but it still receives the CCs from the pedal, so you don’t have to actually go in and connect it when you start the app up.
I hope that helps!