Very similar issue to that posted here:
Despite having both 7.1 and THX installed, the AppEngine application does not show either option, or indeed any option apart from loggin in or out. Meanwhile on Synapse 4, attempting to press the ‘launch’ button to ‘unlock my device’s full potential’ (activate 7.1 surround) does nothing, presumably as a result of the aforementioned issues with AppEngine.


As you can see, the application is not displaying either option. This seems to be a widespread problem, judging from the number of similar questions posted. Would appreciate assistance with this, as well as a solution that might benefit others with the same issue in the future.