Auto Updating the Application (including multiple servers)

You can use the command line tool sed.php to update version 4 installations quickly by running php sed.php update from the root installation folder. This will check if a new version is available and if yes will download the setup pack and then confirm if it should be installed.

To do this without prompting for confirmation, use the -y flag.

php sed.php update -y

Add the above to a cron job to do this automatically.

SED-CLI: Command Line Interface

How to Update Watch My Domains SED v4