So for ToDoList 478 would you just open the dialog Interpret Chords from Midi file in BBW4 and send the chords back to the Plugin ? Maybe have a drop import spot on the plugin.
Then to create midi chord export from the Plugin (ToDoList 479) set BBW4 to Output Chords and save in midi file then save midi file from BBW4 to SavedTracks folder and have a drag export icon in the Plugin, though BBW4 don't have save chord names to midi markers yet (ToDoList 987).
I think ACW was ToDoList 520 smile

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BB-Midi-Chords.png (21.02 KB, 346 downloads)
BB-Chord-Output2.png (15.38 KB, 346 downloads)