The latest Neck Diagrams version 2.1.1 is incompatible with the latest macOS version 10.15.4.

I just updated from Neck Diagrams version 2.0.3 on my Mac (running macOS 10.15.4), and now I can't use the application at all, because each time I try to open it, an error message pops up, saying...

"Neck Diagrams 2.app can't be opened because Apple cannot check it for malicious software. This software needs to be updated. Contact the developer for more information."

Does anyone know if Neck Diagrams is aware of this, and if there is an ETA to fix this?

Thanks!