My PC shows on Tivo Desktop Plus not seen by Tivo Roamio

My Tivo Roamio HAD been able to 'see' my Tivo Desktop Plus (2.83 - ver 412370) to transfer TV programs back to Tivo to play. But now my Roamio no longer sees a Tivo Desktop PC name in the 'My Shows' menu. -- My PC is running on Windows 10.

But my Roamio CAN still see Music and Photos on my PC based Tivo Desktop app and I CAN see Tivo TV programs from the Tivo Desktop app and transfer shows TO my PC via Tivo Desktop.

I've reinstalled Tivo Desktop 2.83 successfully but nothing changed.

Any idea what's going on? :confused:

Thanks,
Tim