Nope, it’s on!
Okay, now it all makes sense. A few nights back, while recording, I had to move the unit (in the dark), and pulled the USB out briefly. So, that switch must have accidentally gotten flipped. Right around that time, that night, I got this weird reverb problem, but only in the monitor out (the headphones). At first I thought it was software, then I tried power cycling the UR44 - that removed the reverb - but also the monitor audio. Grrrr.
Well, thanks for suggesting this - and finding that other post about the missing Audio Hardware Setup (although that really scared me - thought it was doggy software). Not sure how long I would have gone before checking the CC switch. I assumed it had never been moved.
Yeah, anyway, thanks again - we’re back on track with our recordings again.