I'll tell ya Doug, my conce (and not only with this plugin) is that every time WordPress updates and the plugins don't have support and updates as well then either the site will not get updated - core and plugins as well. If updating WP and not plugin then we get what we now have with various plugins and the site breaking or the function of the plugin causing a headache. I'm considering abandoning WordPress and using Joomla instead.
Anyway, hope the developer is well and that his health is not the reason for a delay.
Will be in touch when info comes available - and it will sooner or later.
All the best
Ron