That works!
Thanks for your help, Esmi.
OK, I set up another admin user.
How do I transfer the posts?
Yes, I did use my email address as my username.
Is it the username that WP picks up as the author name in the RSS feed, even if you suppress it in the blog posts?
What is the remedy? Start all over with a new download of WordPress to the domain? Or can you change the username?