How to make Dialog work again?

[Snoopy8]

My question is simple: how do I set up the Dialog? I need it for the htpc (yes, it would be possible to run a toslink connection from the pc to one of the Phantoms but I don't want to buy a new cable and it's also nice to keep the floor free from cables). 

Firmware 2.10.0

The Dialog is visible under 'My products'. But no sound.

I was curious enough to upgrade my Dialog, a 2 step process, first to 2.8.5 then to 2.10. Using 3 Ethernet cables to Golds, Dialog.

To enable optical from Dialog, go to the Devialet App, select room. Under Aux, there should be 3 optical inputs (for my stereo pair). Select Optical (Dialog).