Hi Paul,
On the bottom of the Product Info :: Upgrading from 2.x or 3.0 page on this site, you will find a v3.0 license activation program. Simply run that to activate your v3.0.x version of Diary.
At the bottom of that page you will also find the v3.0.2 upgrade program. Download and run to upgrade your v3.0 to v3.0.2.
I think this covers everything, but let me know if I missed something or if I can assist with anything else.
Jeff |