You can integrate your Quick Shopping Cart with Website Builder version 6. However, with any of our newer Website Builder versions you cannot integrate the two.
So why does GoDaddy continue to sell Quick Shopping Cart without a disclaimer that it doesn't work? We were apparently upgraded to v7 of Website Builder in 2014, but were still able to buy Quick Shopping Cart after that and renewed it for 2 years in July 2016 without any heads up! And sales' answer is that we need to move to vNext and rebuild our website if we want an integrated store. I'm sorry, but that's NOT a solution!