[Owncloud] Automatic upgrade from 4.5.7 to 5.0rc3 seems to have broken my installation

[Chris Green]

I'm running owncloud on an xubuntu 12.10 system.  I have the owncloud
Ubuntu repository in my apt sources so today my owncloud installation
got automatically upgraded to version 5.0.0RC3.

This has broken my owncloud installation.  So a couple of comments and
questions:-

    Should the repository have offered a major new version (and only a
    release candidate at that) as an upgrade?  It's not the normal
    Ubuntu way of doing things, within a particular Ubuntu release one
    usually only gets minor upgrades with bug fixes and security stuff.

    How do I sort it out?  When I go to http://localhost/owncloud now I
    just get a directory listing.

I have just looked at the installation - it's all gone, there's no code
there at all now!  Ah, it has become owncloud-enterprise.

I guess I need to go and see how to migrate my data.

-- 
Chris Green