If you need to edit the product bundle you have just created, you can go to back to the Bundles screen (Bundler -> Bundles). Click the three-dot icon on the bundle you want to edit and select Edit.

As you can see on the screenshot, you can also disable, duplicate, and delete the bundle.

Bundler supports bulk action which is super useful if you have multiple product bundles on your store. You can joint-turn off or turn on several bundles. Take a look at the following screencast.