Add ability to NopCommerce

I need to extend the ability of the NopCommerce 3.70 shopping cart system. The NopCommerce cart allows you to add Attributes to your products. For example, if you sell shirts you can add a shirt color Attribute and add it to your product (shirts). The problem I have is, if you change the attributes, the change doesn't affect the existing products. So lets say you want to add a color to your shirt color attribute, to get that new color on all our existing shirts you would have to go to each shirt, delete the existing shirt color attribute and then add the newly updated shirt color attribute. This is a problem when you have many products. Here's the project: Add a "Update All" button to the Product Attribute setting. When clicked you will go out and find all the products with this attribute, delete the current attribute and add the new attribute. See the .jpg I've enclosed