Upgraded, now I have no "Buy Now" buttons and a ? showing next to my prices

I just upgraded to the newest version of E Shop and now I don't have any "buy now" or "add to cart" button showing under each product, and the is a big question mark (?) showing next to the product price. Does anyone know what happened?

how do I fix this?
www.topnotchgutterstuff.com
www.topnotchgutterstuff.com

Hi there,

1. The Buy Now button is missing maybe because you don't have the shopping cart mode enabled on your store. Please read about how to enable it here eshopdocs.joomservices.com/general-tips/...e-shopping-cart-mode

2. Regarding the question mark next to the price, please go to the back-end of your site, then go to EShop -> System -> Currencies to edit your currency and enter the correct symbol of currency there.

If you need any other helps, please contact with me via ticket system so I can help you.

Sincerely, Giang