I had the same problem with 10.4.4 - blank screen except for File Edit View Note etc ... tabs. I then Uninstalled / Reinstalled - still got a blank screen after signing in. After a while I then got a message “Sorry we are having trouble loading Evernote” - Like WTWrm9 I left it 15 mins and then clicked the ‘Reload Evernote’ tab and it then gave me a success message and started loading my 769 notes.
I run Windows 10 Pro 32 bit