The issue here is just simply -no- response from Anthony or anyone at Dervish in a over a year about -anything-. I think it should be pretty clear to him, or really anyone reading these support forums, that nearly everyone posting here is willing to happily pay to support MailHub. Another "hey I'm on board" thread at this point isn't really necessary.
Sometimes I get the feeling he released the beta as something he sorted for himself once he had to update to Catalina. Perhaps once he gets forced to update to Big Sur we'll get the next beta. 🤣