Currently, the default setting for the product add-on name is H3. However, I’d like to edit this to match the style of the product details, etc. on the product page. I found the php that I need to edit in the “Product Addon” download, but I cannot find it in the editor. If I go to the unzipped file, it’s under Templates > Addons > addon-start.php. Where can I find this within the editor?