Originally Posted by dwanthny
I'm afraid I have no solution for you. Why are you using a version of calibre over a year and a half old?
I suspect that is the version in the Repository for that Distro's release version which never gets an update once the 'version release' is done (Ubuntu). To get the next (already out of date) Calibre, you have to uggrade your Distro version.
Uninstall that version and paste the command line on the Calibre Linux download page (repeat for every Calibre update you want)