ToDoList
In the savedtracks files you need a reference like BBInput.txt
so you can load them back into the Plugin, loading the tracks and the chords. Maybe you could Open the BBInput.txt or
SavedTracks-2019-12-02, 16-06-50.txt

If you could have the Select Audio File(.wav) option on each track this will allow manual adding of tracks.

What are needed also are input level & pan controls for the tracks, maybe sliders like BB ?

Thanks Nigel, The plugin is designed to remove bbinput/bboutput files after retrieving data from them but if you want to prevent that you can add an empty text file called "PreserveAllFiles.txt" to the bb/BBPlugin/ folder. That file will prevent the plugin from deleting any files and they will remain stored in the SavedTracks folder. I'll look into adding the other features you mentioned.