Thanks for the links. I tried all of those Win 10 procedures with the exception of the "deep clean". I've now cancelled my Spotify subscription and let them know why.
I'm going to give Pandora Premium a shot.
Edit: Hmmm, my quick initial research seems to indicate that Pandora Premium is not supported on LMS either.
OMG!! You were my go to digititian! And, I read more fricken stuff and wrestled for about four hours, but was able to get Spotty running on all five of my devices without asking for (much) help. (Despite being informed that one is still registered to the previous owner and that the one I gave my daughter in Brooklyn is registered to my account-but none of this mattered. Go figure)
Did you post on the thread where the Logitech employee who developed Spotty app will answer questions (sometimes complicated w/all those logs)? Don't give up, or does Florida enfeeble the mind?