PGP CLI - Key Management & Renewal on Solaris

Hi All,

I'm planning to install PGP CLI on Solaris 11 server and need following information on Key Management & Renewal

1) Is it possible to get Enterprise(Full Licensed-Never Expiring) PGP tool to be installed on Solaris server

2) How can I renew a existing Public & Private pair Key after expiry(as i don't want to exchange public Key with interfaces during renewal)

3) Do I need to generate a new private and public pair for every license renewal of PGP tool.