Can't find Content Types

Hi.

I've installed CustomPress on a new WP 3.5. The plugin was activated on a single site, not network wide.
After activation, there is a new menu item called CustomPress with 2 subitems: Settings and Export/Import.

I cannot find a way to actually create custom post types anywhere.

There are no other plugins activated and it's the standard theme Twenty Twelve.

Thanks in advance