Hi Thomas,
You need to preview on Studio with the destination url set in Studio for it to work. Preview locally will not work.
Here are the steps:
1. In a file with DoubleClick environment, add a taparea component on stage.
2. Add a tap/click event on the taparea component to use custom actions, in the custom action, you can call Enabler.exitQueryString.
3. Upload the publish zip to Studio.
4. In the Edit Events tab on Studio, make sure you enter a Destination url.

5. Preview in Studio and it should work.
Hope it helps.
San
Google Web Designer team