Can't log back in after changing Quicken ID

I changed my ID due to a new email address and now when starting Quicken it prompts me to log in but the old ID is in the box and can't be changed. I read an article here about how to handle this by dismissing the prompt then going to Edit→Preferences and selecting Quicken ID & Cloud Accounts. When I do this that same login box pops up and can't be dismissed. I have to bring up Task Manager and forcibly end Quicken! I can still use the program by dismissing the initial prompt box but would really like to fix this. By the way, the other alternatives in that article don't work — I don't see the option to sign in as a different user, etc. I'm on the latest subscription version for Windows.