Deliciousitaly You may refer to the JA Updater which encompasses new version updates & changelogs wherein specific changes in respective files can be seen when comparing with older versions and thereon, you may try update the extension after taking backup of your site.
Updating to the latest version ensures that you get new features, updates/improvements and various bug fixes which are being done from time to time based upon feedback being provided
Ref - Zentools2 module