[Parody]

The fix is updating to the latest version of RW on all machines.

The thing that's confusing me is that the error message is indicating that a database version is ahead of the installed version of RW. I'm assuming it's the local database version, because normally when the server is ahead of your installed version of RW and a newer version is required to sync you get a different message on startup and you aren't allowed to sync until you update. (You can still work locally.)

There aren't many ways the local database could be getting ahead of the local version of the software. Copying the database file manually, uninstalling RW and installing an older version, and database corruption are some ways. Of them the only one I'd expect people to do is copy the database, but both of you have said you're not doing that. Thus confusion. :(