I’ve just updated my Mavericks and am receiving a -2003 error when I try to activate

The latest Mavericks update has changed some system file permissions that can sometimes cause a -2003 error when activating the software. This affects the Macintosh version of EasyCatalog only, and the latest version that is now available from our downloads page should fix this issue.

After installation re-enter your existing license codes to activate.