How to upgrade my Joomla application?
To upgrade your Joomla! to the latest version available you should go to your Joomla! administrator panel -> Components -> Joomla! Update.
If there is a newer Joomla! version available you will have an option to one-click upgrade to it.
As an alternative you can use the cPanel -> Joomla! Auto Update tool. More information about it can be found here.
You can also read our detailed Joomla! Upgrade tutorial.