The jury is still out, IMHO. Apparenly there are undocumented features I hadn't discovered. He wrote near the end of his email "As you might notice, we write our manual reactively to user questions, rather than try and come up with a monolithic user manual right off the bat".

He gave me some things to try, but this is a work in progress. I get the impression this 1.0 release will be followed by a rapid succession of updates. They are responsive and listening.

Btw there is more there than I realized. I still think this program has good potential.