Xara Web Designer MX Premium (v8) -see upgrade price from Web Designer 7 premium?

I could not find the upgrade price going from Web Designer 7 Premium to Web Designer MX Premium V8.

Did anyone see that? Or can someone from Xara clarify?

Thanks,
Paul

Here is the link (scroll down to "Upgrades" -- third option): http://www.xara.com/us/products/webdesigner/buy/