If you reach out to the author, I'd imagine he'll get back to you as soon as he's able. He's answered a few questions over on Reddit, and his email address is on the page linked in the HN OP.

The author seems to be responsive, but the Reddit thread got /r/bestof'd so he's probably RIP Inbox'd. And he's a new dad. Might be worth a followup in a few days if he doesn't get back to you beforehand.

I hope it meets your needs though!

Edit: He's also in this thread!