Wow, you've just "opened up" a whole new universe for me by giving me those links!
For some reason, the relationship of the pages hasn't been clear until I took those links and pieced them together with the pages I've been looking at. Now I see how to get to the "Support and Training" page for any extension I've purchased, plus I now see the link to the User Guide on that page. "Now that I understand, I understand." (Boy, that's a common one!). Not sure why I hadn't put all this together before but I'm excited to see that there is a lot more documentation for all of my extensions available than I've been aware of.
Thanks again to you and to Brian.