I can no longer delete individual instances of a recurring event. Neither of the techniques described in https://theeventscalendar.com/support/forums/topic/can-i-delete-individual-instances-of-a-recurring-event/ works any longer.
Individual instances are no longer listed in the edit list, just the master (which, incidentally, seems like it should show the recurrence end date rather than the end date of the first instance). So I can’t use the first listed approach there (hover over instance Trash link).
And when I use the second approach, clicking the “Move to Trash” link from the Edit page for an individual instance, the entire master event is deleted along with all its instances.