Well, I think I've found out the answer to my previous question regarding HotPot7, thanks to the information provided in the plugin's help explanation. ( My question posted yesterday was addressed to Gordon Baetson: "a very basic question")
So I've downloaded HotPot6 and am planning to make activities using 6 because it seems to work better, and under the assumption that the Moodle integration for HotPot7 is under development.
Nevertheless, when I make a JCross activity in HotPot6, the gradebook doesn't seem to integrate. JMix, JMatch, and JCloze have worked fine in 6...
If anyone could offer advice for integrating JCross with the gradebook in Moodle 3.8, I'd be very grateful.