Oh my goodness thank you so much!! I did try their website but clearly didn't try hard enough?? lol
Wish I had posted this question earlier! Thanks again, that was, of course, the solve.
I moved the FonePaw Screen Recording app to the trash, and emptied the trash, but the audio driver is still showing up as a device for sound output.
I use ProTools for recording and it also shows up there as a playback engine option - it's causing major problems and I can't figure out how to...