Similar problem hear maybe. I have evernote on iMac and MacBook, and all my notes were synced to my computer and I had no trouble accessing them offline. Recently I opened the evernote app on MacBook and was created with a sign in screen instead of my desktop version. I have not been able to access that at all. I've removed all traces of evernote and rebooted the laptop and reinstalled a fresh file. Still not success. I went through that process 2-3 times with no luck. I would welcome additional ideas I can try to get back to where I was.