No Longer Showing Product Pages

Originally I implemented MarketPress on a client site (http://samkinggroupsl.com) and all the product pages were showing as intended. However this was until the recent 2.1.6 update that was pushed across. Since the update the product pages are no longer showing up and causing the site to issue Error 404 pages in place of the products page. Please sort this out as this is being used in a live environment!

Thanks

JB