I'm having the same problem as Gannett. I can't export all my notes for backup purposes, since I can only select 50 notes at a time.
I'm running 10.6.9-mac-ddl-public (2254)
Editor: v116.1.14913
Service: v1.26.7
Is the 50 note limit a temporary limit as the new version is updated? Is there another suggested way to make a backup? I don't know where Evernote stores data on my Mac so that I could rely on Time Machine backups to restore the notes if there is a problem.