Sync with Dropbox

I’m trying to sync with Dropbox. I’ve set things up as directed to use Dropbox. Beneath the remote database name is the line, “database not yet synchronized; upload database.”

How do I upload the database? It’s been sitting like that for weeks. I have no sync between my Mac and and iPad.

Have you checked the checkbox next to the database?
If so, what is reported in Window > Log?