The developer responded to me on twitter a few days ago (1st October 2016) very quickly when I mentioned the application and that I had recently purchased. He advised that he was intending to release a new macOS version he has ready shortly. https://twitter.com/praeclarum/status/782235544113680385
I really hate posts like this. They're offensive, as intended, and useless. Lack of daily updates IS NOT a sign of "abandonware." Not responding to your posts within milliseconds IS NOT an indication of total calamity. Good grief, people. Your timeframe is not anyone else's; get over yourself.
I admit that my confidence is dropping now though as the developer is pretty quite on this product (all platforms). I do hope he has not lost interest. I do not see a viable cost effective alternative.
this project needs to live, or a better alternative needs to surface, for the progression of mankind.