Found on cnews.corel.com...

The Corel Painter 8 Update (English) is now available! You can find it at
http://www.corel.com/painter8 in the “Downloads” section. Other languages
are well underway, and I will follow up once they are ready.
Before downloading the Corel Painter 8 Update, please be sure to read the
“Installation Instructions”. It contains important information about
installing the update.