[ubuntu] Installed rTorrent from source previously; overwrite with a package?

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http://ubuntuforums.org – I installed rTorrent manually (through compiling and such), but now I need to upgrade it. I had a look at whether my system recognised rTorrent being 'installed', and it said it wasn't, so if I did 'sudo apt-get install rtorrent' it'd install an entirely new package. I didn't proceed as it didn't recognise the old version. How could I go about upgrading without losing my rTorrent session (torrents and so forth), and without screwing everything up? Best regards, c3ntury. My current version - rTorrent 0.8.9 (Hardware)