It is possible to upgrade from PGP Desktop for Windows release 8.x or 9.x to Encryption Desktop but it is not possible to upgrade directly to the currrent release of Encryption Desktop.
Starting with PGP Desktop 9.12, here are the major versions that have been released:
If a client is currently running PGP Desktop 9.12, to upgrade to Encryption Desktop 10.4.x it is first necessary to upgrade to a 10.1.x version of PGP Desktop. After upgrading to version 10.1.x, it is then possible to upgrade to 10.4.x.
Existing keyrings and PGP Virtual Disks are usable in upgraded versions.
After each upgrade, by default the system will be rebooted. It is vital that the reboot occurs. Upgrading a system and not rebooting the system between versions is not recommended or supported and could lead to data loss. Once a system has been upgraded, please reboot as soon as possible to ensure the system is properly upgraded. For example, upgrading from 9.12 to 10.4.x, these are the steps performed:
There is no direct upgrade path for PGP Desktop 8.x or below. Decrypt the drive, backup keyrings and uninstall before installing Encryption Desktop 10.x. Existing keyrings and PGP Virtual Disks will be usable in the new release.
Follow the installation process for PGP Desktop 10.x for Windows.
Existing versions of PGP Universal Satellite for Windows are automatically uninstalled, and PGP Desktop 10.x for Windows will be installed. Existing settings will be retained.
Manually uninstall versions of PGP Universal Satellite 1.2 or below before beginning the installation of PGP Desktop 10.x for Windows. Then follow the installation process for PGP Desktop 10.x for Windows. Existing settings will be retained.
Important Note: If you are upgrading your computer's operating system and want to upgrade your version of Encryption Desktop or PGP Desktop, uninstall any previous versions of PGP Desktop before upgrading the operating system. Be sure to back up your keys, keyrings, and PGP Virtual Disks before uninstalling PGP Desktop. Note that if you have used Drive Encryption or PGP Whole Disk Encryption, you must decrypt your disk before you can uninstall PGP Desktop and upgrade your operating system.