Cynosa and DeathAdder v2 colour sync

So I purchased a DeathAdder V2 this afternoon.

I already have the Cynosa keyboard. And have a custom lighting profile that cycles through the rage of colours starting in one corner of the keyboard and moving to the other corner.

I was kind of baffled by the lack of set up instructions for the DeathAdder but I eventually got it set up and recognized by the synapse app. The logo was lit and there were lights around the scroll wheel and, IIRC, the side buttons. what's more they were changing colour in sync with my keyboard.

BUT! the mouse would not move the cursor on my scree. Then...doh...I realized I hadn't removed the clear plastic on the back of the mouse.

So I peeled that off and suddenly the only light I had was the green logo and nothing else. And no synchronization.

I don't know how to change it back to sync with the keyboard and so that the scroll wheel and the side buttons are lit.

Can you please help?