@Anonymous, of course, that's right, you did not say that. (And your message was right above mine!) I got two messages mixed up, yours and one on another of the several threads. Apology.
I don't doubt that your solution will work. I had not tried Always allow. That's simply a security habit of mine. It's interesting that Allow fails and redisplays the box, but Always Allow works.
(I had managed to get past the error by dealing directly with Keychain Access. Lost my data, but the data I reentered was stored in a new file and that new file is saveable and reopenable.)
