From what I see, it’s been a while.
Via Google Translate, he said he was working on fixing some crashes and asked what remaining Listary 5 features should be ported over.
His last login to the forums was January 17th, 2020, two months ago.
Make of all this what you will. I sincerely hope Listary 6 progress continues either under Channing or someone else at Bopsoft.