Sorry, I didn't mean to send you down a long rabbit-hole.? I have no idea how to make airspy work, either.? Someone else here used NaP3, and posted the way they set it up, and that's what I have used.? So if you ever want to try again, maybe search these messages for NaP3 and use that approach, or post a message asking for a program and setup that work nicely with QMX.
Stan KC7XE