You may have downloaded the product before the Branding Free add-on was assigned to the parent product.
TL;DR: Re-download the product and re-upload the files.
After migrating from vBulletin, I made it so that when you purchase a Branding Free add-on, it needs to be associated with a license for the parent product. For instance, if you owned 2 licenses of DB Shop, but only 1 Branding Free license, you would need to choose what license to associate that Branding Free add-on with.
Unfortunately it was not possible to automatically assign all Branding Free add-ons to parent licenses during the migration, since multiple people owned multiple copies of each license and each Branding Free add-on.
About 3 weeks ago or so I decided to put in the effort to solve that issue, automating as much as I could and manually sorting out the ones I couldn't.
If you downloaded DB Shop after the migration, but prior to the Branding Free add-on being associated, then the Branding Free would not be applied.
Might be a good opportunity to upgrade to the latest version as well, as v6.0.0b6 is not the latest version