If you are using the Antivir Premium version 2010 you should have already received the slideup to upgrade your product to the latest (and greatest) version 2012.
Once you click on that link and you will be redirected on this page.
On the page you have the possibility to download the newest version of the Premium version 2012 version or to upgrade to the Internet Security Suite 2012 (previously Premium Security Suite).
Here are the new names again:
|Old product name||New product name|
|Avira AntiVir Personal||Avira Free Antivirus|
|Avira AntiVir Premium||Avira Antivirus Premium 2012|
|Avira AntiVir Premium Security Suite||Avira Internet Security 2012|