Manual Un-installation
Step: 1 => First, Click on Online Store >> Themes >> Actions >> Edit code from your shopify store.
Step: 2 =>Now click on Snippets and remove shagun_fbt_details.liquid files from your theme.
Step: 3 =>Now click on Sections and inside product.liquid / product-template.liquid and remove {% include 'shagun_fbt_details' %} text from your theme.
Step: 4 =>Now click on Sections and inside cart-template.liquid and remove {% include 'shagun_fbt_details' %} text from your theme.
If you are not able to remove the Cros-Sell app code from your theme, then simply send us an email at support@zendapps.com. We will help you remove code from your theme.