You’ll need to install latest V3 version to be able to use a V3 database with V4. Also renaming a SQL Server database is a little tricky. Just renaming database would not work since you’ll need copy and rename physical MDF files.
You’ll be able to change database name from connection string on next release.
I noticed that the error from the ticket if you add a tag, which is required prior to the opening of the table. If you take away the ticket tag the database by mistake.
The error from the database with the default