Upgrading Subsonic while preserving users and settings

[vistal]

I am currently running Subsonic 4.9 on Centos. Was looking to update to 5.1, but I would like to preserve my users and my settings. Is there any definitive list of files I should back up to do this?

[qupfer]

I tought to save /var/subsonic (or /var/lib/subsonic) should be enough.

But I have no idea, if a 4.x database is compatible with a 5.1 one.