I can find where to change the email in Account but when I do its also wants me to change the password, and I’ve seen posts from others that when they did this they created a new account and didn’t just modify their current one. My current email is thru a rural ISP and I have canceled my account there, so I need to change to a different email.
I don’t care about changing the password as long as I don’t mess with my existing Plex account.
The problem was that I had saved an old username/password in a password manager- it had the same email- and I was using that invalid password instead of the correct one. Having 2 password managers can cause problems. Thanks for your help, I got the email changed.