I didn’t know the full current trunk package can be downloaded that way. That is good to know. I had manually downloaded modified files. However, I just deactivated, deleted the plugin directory, replaced it with one unzipped from that link, reactivated, and still have a rectangle with a green background instead of a map on single location pages.
I haven’t done any troubleshooting since doing that. Maybe I should temporary change back to 3.2.12 as a test to be sure the problem isn’t due to something else I inadvertently changed. I don’t recall changing anything else since single location maps displayed, but I never have been able to recall things that I can’t remember!