PGP Desktop Updates

I've been a PGP user for quite a while now. A couple of years ago I bought the software (before that I used the free PGP versions). My original license was for version 8.x. Every once in a while that would be a message indicating that there was a new version available.

The last couple of months there were no new messages, and when I checked for updates from the application the default message was "you're running the latest version".

But according to the PGP website there were newer versions (9.8, 9.9). So I 'registered' for an evaluation version and installed that over my existing 9.7 version.
After the reboot everything worked. My (old existing) license is still valid. So why is PGP not telling that there's an upgrade available?

I guess the fun will end with the release of version 10.
B.t.w. I still find it frustrating that they removed the SIGN and ENCRYPT buttons/functionality from within Apple Mail.app. I don't want to sign all my outgoing mail (which happens when you configure the mail proxy settings). I want to be in total control :)