I was wondering the same thing and hope this helps. If when you log in you see the new site, there is a "settings" icon(loooks like a gear) in the upper right hand corner between the bell icon and the "log out" button. When you click on it you should be redirected to a screen that allows you to change your settings. Scroll down a little bit and on your right-hand side you should see where you can add another email address to your paypal account. Once again, hope this helps and wasn't too confusing.
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