Configuration changes depend on the developers. For example, I used to use Evolution on Linux / Gnome as my email client. Their attitude to compatibility is terrible. As in, they just don't care at all.
If you allowed it to upgrade your Evolution data store there was no going back.
In a BeOS case it would be as if it migrated to different configuration keys in the new version, then the old version would detect corruption, throw a fit and erase ALL the keys.
If you allowed it to upgrade your Evolution data store there was no going back.
In a BeOS case it would be as if it migrated to different configuration keys in the new version, then the old version would detect corruption, throw a fit and erase ALL the keys.