Updates help us and you to keep your copy up to date. Updates consists of some changes to DB and files reflecting new features in script.
To apply an update to your script just click Maintenance - Update script
cd /path_to_scj/admin env HTTP_HOST=yourdomain.com php update.php
You can create a file with all your domains
cd /path_to_domain/scj/admin; env HTTP_HOST=yourdomain.com php update.php cd /path_to_domain2/scj/admin; env HTTP_HOST=yourdomain2.com php update.php
and so on and run it in SSH
sh update.sh
This way you can update all domains at once.
Note: update script doesn't overwrite index.php or any other files at the root of your domain. So you have to copy index.php (if you use it). If you don't want to do it each time you have 2 options:
There's no built-in update rollback. The only way is to create a backup before update.