[Evolution] Migrate from Evolution 2.12 to 2.28 without backup?

["Bob Fleming" <bfleming umeoce maine edu>]

I recently installed a newer version of Centos after a drive began failing.

Although I have a copy of all files from the old drive, I foolishly did
not go through the Evolution backup process.

Is there a process for restoring configuration and mail folders outside of
the backup/restore process?

Can I just "import" from the old Evolution folders?