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I am still getting used to dual running Ubuntu on my Windows 7 machine using Wubi. I currently have Ubuntu 12.01 and want to upgrade to 13.04. According to the instructions here :http://www.ubuntu.com/download/desktop/upgrade
I first need to launch the dash and search for an "Upgrade Manager". I do that but the only option I get is a software updater.
PS, I am still getting used to using a terminal so I would really appreciate not using the terminal quite yet till I am more familiar with it (if at all possible).