With the new update of Noteshelf - v8.3, you can now sort your notebooks on the shelf in any random order. So if you don't want to sort your notebooks by Date or Name, just drag them around and rearrange them as you like.
To set the shelf to Manual sorting:
Open the Noteshelf app
On the main shelf view, drag down the page to get into sorting mode and select "Custom"
- Drag and drop the notebooks anywhere you want.
We hope this helps. Happy note-taking!