Here's a user interface anomaly:
File/Open Notebook in the menu brings up a Finder window to open a Local, Dropbox or Box notebook.
To open any of those three, or iCloud, WebDAV, OneDrive the user has to click on + to the right of 'NOTBOOKS' in the Tree.
This makes *no* sense to me. The File/Open Notebook option should allow the user the same options as the + in the Tree.
The first rule of technical writing and design is to remain consistent throughout the user experience.