Quote
"Please try moving your Evernote database directory so that Evernote will regenerate a new local database by copying your notes back down from the service. To do this:
Quit Evernote, and quit the Evernote clipper in the menu bar.
In the finder, open the “Library” folder in your home directory
Navigate to “Application Support”, and then “Evernote”
Move the “data” directory from that location to a different place (like the desktop)
Start Evernote, provide your username and password again if needed
This will synchronize all of your notes from the service and create a new local database."