Does the following from the PGP User's Guide help?:
Checking for Updates
Note: The option to automatically check for updates is no longer available in PGP Desktop, starting with version 10.1. To check for an update or to install an update, you must manually download the file.
With the acquisition of PGP Corporation by Symantec Corporation, PGP operations is in the process of integrating with Symantec operations. When checking to see if there are updates, or to download an update, use the second download link if the first link does not appear operational.
To upgrade PGP Desktop, do the following:
•
Go to the PGP License and Entitlement Management System (LEMS) and log in (https://lems.pgp.com/account/login). If the update for PGP Desktop is not available, then
•
Go to Symantec FileConnect (https://fileconnect.symantec.com/), select your language, and enter your serial number.
Upgrading From Standalone to Managed PGP Desktop Installations
If you have been using PGP Desktop in standalone mode and now will be managed by a PGP Universal Server, you must install a bound and stamped version of PGP Desktop over your existing, standalone installation. You must also complete the enrollment process. Your PGP Administrator will provide an installation file so you can install a bound and stamped version.
Upgrading the Operating System Software
If you are upgrading your computer to a new major release of the operating system (for example, on a Windows system to Windows Vista or on a Mac OS X system from 10.4.x to 10.5.x), be sure to do the following:
1 Back up your keys and keyrings before uninstalling.
2 If you have used PGP Whole Disk Encryption, decrypt your disk before you uninstall PGP Desktop.
3 Uninstall any previous versions of PGP Desktop before upgrading to the new version of the operating system.
4 Once you have upgraded your version of the operating system, reinstall
PGP Desktop. Import your keys/keyring and, if necessary, you can then
encrypt your disk.