Folks -- Had same problem. See separate Evernote forum thread dated last July for answer: http://discussion.evernote.com/topic/39799-error-message-please-check-your-internet-connection-or-try-again-later/#entry215475 Appears to be a problem after auto-upgrade did not include account sign-in info. So, at least on a Mac, click on "Evernote", look for "sign out (null)" and click on that, then follow prompts to log in using your existing Evernote account. Problem solved, and JohnnyJohnster gets to be a hero again!
