1. Go to your Shopify Admin > Settings > Apps and sales channels
2. Look for Easy Donation from the App list and click on Uninstall
4. Once the app is uninstalled, make sure that you have removed the short code from the theme files too.
Theme 1.0
a. Go to Online Store > Themes Section > Edit Code
b. If its configured on the Product Page, search for product-template.liquid file
c. Look for ‘Donation’ keyword in the file and remove the short code
d. If configured on the Cart Page, look for cart-template.liquid file
e. Look for ‘Donation’ keyword in the file and remove the short code