[imp] Upgrade question

[Gary Smith]

I have a server that I have been updating from cvs using FRAMEWORK_3 with these options: horde framework imp ingo kronolith mnemo nag turba

I'd like to update everything to the current.  I assume that it's now FRAMEWORK_4.  On the old cvs browser you could see the tags that's available. Which label should I be using?

Also, the most important question, can I upgrade 4 in place over three without it destroying my config files? i.e. update in place, go to admin, make the changes, then update the config from there or will the app break because of breaking config changes.

TIA,

Gary Smith