On your laptop, go to
www.entourageedge.com and "Log In". Then click "My Account". Follow the instructions in red at the top of the page. At that point, run the Update app on your eDGe to download and install the beta directly.
Alternatively, on your eDGe, run the "Store" app and click the "My Account" link at the bottom of the page and do the same.
The update will not download until you've done the "opt in" step above.