Yes it was an old Win client. I had tried everything in the page you referenced already, except downloading a fresh version. Fortunately the download is smart enough to recognize the existing installation, preserve settings, remove it, and install a current copy. I'm up to date at last. I just got a new computer and I think the ancient version came over from the old computer. We still don't know why it wouldn't update. Moot point now. Thanks for the suggestions.