Photoshop CS 6 Exteneded

Just purchased Photoshop CS6  I needed to upgrade from CS 4 to CS 6 Exteneded.

The back of the software box says " Also available Adobe Photoshop CS6 Exteneded software"

Have i purchase the correct upgraade software package. The box does not indicate Photoshop 6 Extended only a black sticker on the side which says "Upgrade from Adobe Creative Suite 5,4,3.x"

Would like to know if this box is good for the exteneded upgrade or do i need somthing else.