Fully agree with this. I use the notebook feature a lot and having all of my notebooks in a single list is cumbersome and difficult to navigate. I don't understand why this feature was removed for the new update but regardless of the reason, please bring it back.
I've been having the exact same issue as well. I've restarted my computer (Macbook Air, OS X El Capitan 10.11.6) multiple times and I've uninstalled/reinstalled, but to no avail. Any tips on how to fix this would be greatly appreciated because all of my notes are bulleted lists actually.