Yes, there is an update for your version of Catechism of the Catholic Church, but it will not work on Windows 7 computers. Unfortunately, the latest version of the software can't run on the latest Windows platforms. In order to install and run the program on your PC, I suggest you try Windows 7 Compatibility Mode. Insert the CD in the drive, right-click on the package and select Properties. Navigate to the Compatibility tab, check Run this program in compatibility mode for box and select a compatible platform from the list. Click Apply, OK, right-click again on the installer and select Run as Administrator. If it doesn't work, try installing the program in Windows XP Mode environment.
