Connecting to a lower version DataBase from the front end tools (i.e., Manager, Designer) will prompt the user: "There are updates, do you want to install them?" Clicking yes will run the update. This means "updater.exe" will run and update files locally based on what exists in the database.
Following that, a connection to the database, via the web portal will update the "Bin" directory. As now there are updates that need to be performed, this occurs in the Bin directory.
While the updates are occurring the web portal may be unavailable to end users.