PGP Desktop 9.6 and above provide support for Microsoft Outlook 2007. If you have a version of PGP Desktop 9.5.x and own current software maintenance, you should be able to update through the software automatically by clicking
Check for Updates within the padlock in your system tray.
With a current Software Insurance\Basic Maintenance License, the most current version of the software may also be downloaded using the download link included with your order confirmation email.