Data Base synch issue.

How do I get the files from the remote group up to the local group. Right click on the remote data base shows synchronization is greyed.

You need to click the first button under the databases list or right-click and choose Import Database. You always need to import a local copy of databases you want to Sync.

Just as a (maybe useful to someone down the line) addendum to this post, I’ve just found myself doing this, with the only changes made being not opening DTPO for a few weeks, updating to macOS Sierra and installing a VPN app.
So potentially OS update and/or adding VPN forces download of new copies of databases to mac?
All syncs fine now - thought I would leave this note in case a) I’m right and b) someone else finds this thread like I did.