Need to archive old notebooks.

[Gordonrobb 2]

I use Penultimate for work everyday. I have Notebooks for each project or course I’m running, each with lots of notes. I don’t mind the old ones cluttering up muy Evernote, but I want to find a way to archive them from Penultimate. All they do is make it hard for me to find my current notbooks. 

I searched and found some discussion abou this, but from years ago. 

I can’t believe that there has been nothing done about this, so can someone point me in the direction of what to do about archiving/hiding old notebooks in Penultimate? Before, I go back to using my previous writing APP

Thanks.