If it’s still in your library, you can find it like this:
- Go to your library (from the drop-down menu at the top right corner of the screen).
- Go to My Purchases from the menu in the left.
- Go to the Bundles tab (near the top of the screen).
- Search for Black Lives Matter using the browser’s search function (ctrl+f), or just scroll the list until you find it.
If it’s not there, then there’s a possibility that you used a different account to buy it.