You can follow these steps to remove all the resources created by Zakeke after you've removed the app from your store:

Delete all the snippet files from your theme

Note: if you've followed the guide to set Zakeke to never create a new product, you should undo these changes before removing these snippets. This only in the case if you've followed that guide.

• From "Shopify Admin", select Online Store > Themes
• Select Actions > Edit code on your active theme
• Delete the following snipped files (if present):
  • zakeke-customizer-price.liquid
  • zakeke-cart-item-price.liquid
  • zakeke-cart-item-properties.liquid
  • zakeke-cart-line-price.liquid
  • zakeke-cart-item-edit.liquid
  • zakeke-cart-subtotal.liquid

Delete all the products created by Zakeke

• From "Shopify Admin", select Products
• Delete all the products with this type: zakeke-design

Delete the filters added by Zakeke in the connections

• From "Shopify Admin", select Products > Collections
• Remove this condition from your collections (if present): product type is not zakeke-design