You are awesome, EightBitz -- greatly appreciate it!
(And that video is impressive!
)
Even thought I'd tried the GUI before, I was finally able to get it to work. I have no idea what I did differently. (I really should have kept better notes on the early attempts, and naturally I was being meticulous this time, so of course it worked.
)
The first time, one map with areas revealed with the reveal pen (instead of the reveal area) showed in the HTML as a message that the image wasn't available (not as a broken link), and there was no thumb or full image of that map included. I re-exported and re-ran, and it worked fine. (Probably an error in the export, in that situation.)
Thanks for the help (and patience
)!