Hi Lynda!
Your site or theme designer can apply the appropriate css styles to define the layout of Woocommerce product page. As you can see in our site, related items is displayed outside of description tab. (This layout is the default in case of most themes.)
Alternative solution: We have a beta version of the plugin in which you can set a WooCommerce specific display position in case of WooCommerce product pages. It can be done on “Product Page” tab of WP Related Items (WRI) Settings page. If you would like to try out this beta version please send an email to info@webshoplogic.com.
Peter