Well, as per the instructions, I uninstalled 0.8 and then installed 0.9... some things went across (home page, a few options) but my themes, extensions and plug ins did not
Currently, when I go to the Themes page, none are displayed so I'm stuck with the default for a bit :/
Not a smooth transition then. It'll be worth it once I got it behaving how I used to, no way am I going back to IE. Just a pity it can't work properly first time :/