[Help] I'm having trouble "declaring Woocommerce Support" with Shapely

Hi guys, I’m hoping someone can help me out here. I’m unable to edit much of my website because Wordpress is telling me that my theme does not declare Woocommerce support. I tried using their integration guide to change page.php to woocommerce.php, but I can’t locate my Shapely theme’s core files (I can only access them through Editor in Wordpress, and that doesn’t allow me to create a new file).

The guide suggests another solution, called creating a “hook”, but as I’m not a developer it looks far too technical for me.

Has anyone else run into this issue before? Is there an easily solution?