Since this thread spans a couple of years, I might assume the multiple email address feature has been added. I never wanted multiple email addresses, but somehow Evernote (free) got a second email address for me, possibly because I logged in one day using my google account, unsure how they got it. At any rate, a couple years have passed and now the (yahoo) email address I used to create my Evernote account is invalid but still showing as my log in address. When I go to change it to my google (gmail) address, the system says "address is already in use." Therefore I am completely unable to update my login address. I have accessed the contact Evernote developer form on the Google webstore and explained it in detail with no results. I have accessed a report bug form, got a ticket number but no email to confirm the report, probably because Evernote is still showing an invalid email as my primary address.
Any help would be appreciated in trying to get issue squared away. Again, this issue is unable to update my login email address to the "address already on file" and remove the old invalid login email address.
I posted this here because it may show people the downside of giving Evernote multiple email addresses but I would also like to know the proper place to post my issue to receive any help or advice with the problem.
UPDATE: I have figured out how to add a GMail subaddress and this worked to update my old invalid Evernote yahoo login address. However, I would advise all users to think twice before giving Evernote more than one email address at a time to avoid the hassle I have gone through.