Some themes built for Shopify stores has already a built in cart drawer. When you install "ULTIMATE Cart Drawer" but you still see your theme's drawer/popup, here's what you can do about that:
- Login to your store and visit "Themes" page
- Click the blue "Customize Theme" button on top right
- Click "Theme Settings" in top
- Click on "Cart"
- Change Cart Type to "Page" if it's set to something else.