I have the new 9.10 Ubuntu ready to install but wonder if there is a way to upgrade without wiping out other apps and files that are in the current 7.4 (I think that's the version) I am running on my laptop. I started from the 9.1 disk but can't see a upgrade-type install option. Is this possible or do I really need to do a clean install of Ubuntu every time there's a new release?
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