Some of the functions worked, some didn't and one caused display issues.
I issued a ticket which was automatically assigned "low priority" status and I heard nothing from the developer in this regard. All emails, tickets have been ignored. However, an email making a special offer for a bundle of modules for $25 was received. I checked this out and found the offer was in fact $40.
Another user has had a similar experience and it seems totally inappropriate for this promotion to be appearing