Here is a video tutorial on how to update (and check for updates) to your JA extensions and templates
via JA EXTENSION MANAGER
The auto upgrade, backup, rollback feature are available in the JA Extension Manager Component. For more information how JA Extensions Manager work for Joomla 2.5. Please have a look at follow video
Also, you can check new version with our online update system at update.joomlart.com. Login with your JoomlArt username to view file comparison between versions.