There are two ways of showing bundles within Shopify. It's important you choose the right one for your business. You can find a full overview of the options available and benefits/limitations of each here:
Single SKU Bundle Installation
Installation for Single SKU bundles is automatic when you install the app. You can check on the status of the installation by clicking on the "Settings" button in the top right-hand corner of the app and selecting “Installation” from the options:
The installation process will install a single template in your current theme. The file is called
product.bundlebuilder.liquid and will be in your 'Templates' folder. This file ensures customers are automatically navigated to your bundle page.
If you are using a new theme, or have deleted the snippet, you can reinstall by clicking 'Reinstall' here.
Multiple SKU Bundle Installation
We have a full guide on how to get your theme ready for Multiple SKU bundles here: