Renewing to all PC

   I may have this wrong, but why do I have to go to each PC to renew my NIS subscription?  I've gone to Norton Management and didn't see a way to renew all of my PC's from there.  After I enter my new key on one PC, and then go to Support>Subscription Status, it shows 366 days as it should.  Why won't it automatically update my other two PC's, when I click on their Subscription Status?  The screen shows the PC is communicating with the server, where my new subscription is located.

  Second question.. where can I download and install the latest version?  I am using 21.5.0.19.  Could this be the latest version?