Per project Activation
To help control access, you can enable Urban Turtle for specific projects or collections, but not for individual users. This is done through the server-level Administration Page which you can access by clicking on Administer Team Foundation Server on the server home page and then on the Urban Turtle tab.
Navigation Change 5.10.5
As of versions 5.10.5 and up, the navigation for this panel has changed. Now you will need to go down under Collection Settings.