I have a similar but not-quite-the-same problem. I'm a long-time Premium User and am a big fan of Evernote. Recently I changed both my email address and my password in account settings using Evernote Desktop, and I am able to login to my account on different devices using the new email and password. However, when I look at my account settings it still shows my old email address. When I click on Manage Email Addresses it wants my password, but neither my new nor my old password work. I appear to be stuck in a loop between changed email addresses and passwords. Suggestions?