DT3 Mail Importer Issue - Hierarchy collapsed

I have some mail rules set up to move work email into various mailboxes in .Mac, grouped together into a top-level mailbox (“aaGlasgow”). Under DT2 I would just backup this one mailbox. Under the new DT3 system, the hierarchy has been collapsed and the second-level mailboxes are mixed up with unrelated ones. Help!

Did you install & enable the plugin for Apple Mail via DEVONthink 3 > Install Add-ons? Please remember that it has to be enabled in Apple Mail > Preferences > General > Manage Plugins…

Yes. Before I did that I was seeing nothing in the list at all.

Does it work after restarting DEVONthink? Anything logged to Windows > Log? The hierarchy is only flat if the plugin is not installed, not enabled or not working for unknown reasons.

Ah - a restart of DT3 fixed it thanks!