The solution suggested by Sayre Ambrosio (thanks, Sayre!) worked like a charm in my case! I am a Macbook user and was unable to add the templates to my notes. Upon downloading (re-installing) the app straight from the evernote website instead of the Mac App Store, this problem was resolved - worth a try for anyone still facing the issue (or future users who might land up on this page like I did just a few minutes ago).