[SamQ]

I'm using an old stable version of XBMC (Eden).
I'd like to upgrade, but I don't want to lose all my setting/favorites/addons/ etc.
How do I upgrade without losing anything?

[Ned Scott]

Backup userdata (wiki) folder (because you should backup regularly anyways) and just install Frodo right on top of Eden. You should not lose anything.

[Kib]

To add to that: In case something goes wrong, install eden on top of your install, restore your userdata (wiki) folder and you are back where you started,