Sidebar & Twenty Eleven Child theme

At first: thank you for this plug-in.

My question concerns the Twenty Eleven theme and sidebar. I have done a child theme where is a right sidebar in the default page template. The sidebar works fine otherwise except on product single page where the sidebar is empty.

I noticed that plug-in templates.php -file contains something about Twenty Eleven and sidebars.
$nosidebar = array(“twentyeleven”); and so on…

Is there any possibility to make sidebar visibility on the product single page?

https://www.ads-software.com/plugins/ecommerce-product-catalog/