What does 'Revert' mean in Intelli-Site?

On rare occasion, the Server may encounter a database connectivity issue.  When this happens, the Server will pop up a warning message.

By clicking <Revert>, you are instructing the Server to set the database type to "MS Access".  This is a special diagnostic mode.  It allows you to correct your database settings if there is a problem with them.

When the issues have been resolved, you will need to return to using the database.  How do I return to using a database after Intelli-Site couldn't connect to the card database?