Hello @Steve Gilbert
Thank you for reaching out on the community and telling us about your issue. I do apologize for the issue you're having. If you haven't already I would try to sign out/in from the program so that it's able to pull your new email if you haven't done so already. I'll leave steps down below.
Once you've done this it should have you sign in with the new email address. Let us know if you're able to get it changed.
Thanks,
Quicken Francisco
https://www.quicken.com/support#contact-support
Quicken support is better able to assist with confirming and correcting account discrepancies.
-Quicken Tyka