That is something that we have improved… but on our own fork of Core Apps only. Despite the version number that you see there on our fork, it is in fact a variation of Core Apps 1.7. It is unfortunately not compatible with Ref App versions higher than 2.3. We are overdue to port that whole ‘edit registration’ feature to the community repo, but we don’t have the time or the resources to do so. Is that something you could do?
See, from back in the days: ‘How to use the Address Hierarchy Module with the Reference Application’.