If you plan on making the client a stand-alone then here is the location in the Registry.
Registry locations for PGP 32bit and 64 bit
The PGP Stamp is located in HKLM\Software\PGP Corporation\PGP for Windows 32-bit
The PGP Stamp is located in HKLM\Software\Wow6432Node\PGP Corporation\PGP for Win64.
Change the Stamp to Default PGP Stamp.
If you want clients to have control over their keys then use GKM mode. The server will be a backup for the client keys.
Thanks
Anthony