WooCommerce Featured Image

Hi there,

I’m trying to set up the WooCommerce plugin on my website (jellyinkd.com), but in the product page, the featured image option isn’t showing up. I looked it up on the internet, and saw that a lot of people having this issue resolved it by adding ” ‘product’ ” to this code in the functions.php file :
add_theme_support( ‘post-thumbnails’, array( ‘post’, ‘page’, ‘movie’, ‘product’ ) );

But I don’t have this line in my functions.php file. I cannot find this line anywhere in my php files.
I’m using the “Pure” theme by GT3 themes.

Any help would be much appreciated!
Thank you for your time 🙂