Hi i visited http://www.ubuntu.com/download/desktop/upgrade to learn how to upgrade from 12.10 to 13.04. Now i dont have update manager instead i have software updater in my dash. However when i open terminal and type update-manager it opens the same thing as software updater from my dash. Hence i assume it is the same thing. It checks for updates and after downloading some files it just say your system is upto date. Their is no option for upgrading.Help how do i upgrade.