Hi I got the same issue. Never see the paid software have this kind of issue. Never!
For Mac users, you could do this. in the Finder, search Evernote on your home folder which contains Desktop, Documents, Downloads, etc
BUT, if you ever had unsaved notes, this way will just delete everything, you can check on the web, if that exists on the web, you should be good to do following.
** before that, you probably need to manually kill the process of the Evernote, I did that, but not sure if this is necessary. if you don't know how, just skip this step and process the next step. or just restart laptop and process the next step
To make it easy, you can delete all Evernote directories. before you delete, you can click that directory, at the bottom of the Finder window, you'll see the directory path, if that is not something you created specifically by yourself, you should be okay to delete.
start should work.