Hi,
I had first tested the Professional plan, and it worked great - including Smart Sync. But I decided to go with a Plus account, since I didn't need more.
As soon as I "downgraded", the SmartSync feature stopped working.
When I right-click on the Dropbox folders and files now, I only get the standard Apple menu items (move to bin, get info, etc.)- nothing from Dropbox including Smart Sync/online only/etc.
I'm running 11.6.6 ****** Sur
Currently no sync issues as seen from the dropdown from the icon in menu bar.
Hope you can help. 🙂