It's very easy to run a new version using a config saved from the previous version, but then one may, probably will, be missing things new in the new version..
It's quite a slog to start with the new version and remember and find all customizations that have been done to the previous version.
I know Leo will say it's straightforward, but I'm not completely convinced.
See Details view with small thumbnails for some slightly misplaced discussion of the subject.