I looked the folder had the 'hidden' box checked. I unchecked it and there was no change.

I changed it back:

Both captures were after the changes were applied via 'ok' and then reopening the properties.
BUT!....
I also tried getting the individual files to change. Unclicking the 'hidden' "opened" that particular file.
I tediously did all the others, one at a time, with the same results. Here's what the thumbnails look like now:

So...
Changing the folder attributes didn't change anything. Individually changing my hidden shots fixed it. Un'hidden'ing the folder had no effect, and I had always been able to see it in the tree, so I presume that the folder itself never was 'hidden'.
So, on to the one which actually started all this; it's entirely grayed:

Its properties were already not 'hidden' - but I expect I can deal with the pictures as they show up, again, in other folders.
I started to say that I wish there were a global solution. But I wondered... What happens when I click one, then 'control-A' and highlight them all, and ask for properties.
Sure enough, it showed 'hidden' - and when I clicked it to remove it, all of them came up brilliant.
So, a brilliant, pardon the expression, solution, and thank you so much. I'd actually tried the folder version of 'hidden' or not, but as you saw, it didn't change the contents. Highlighting/selecting 'all' got it to come out of hiding.
Thanks again!
