To install the Pop-up Reviews widget:
From your Shopify admin, go to Online Store > Themes.
Find the theme you want and click Customize.
Click the App embeds icon (third one on the left menu).
Enable "Judge.me" and "Pop-up Widget".
Click Save.
To remove the Pop-up Reviews widget:
From your Shopify admin, go to Online Store > Themes.
Find the theme you want to edit and click Customize.
Click the App embeds icon (third one on the left menu).
Enable "Pop-up Widget".
Click Save.