No Game Performance Mode in Dolby Access App

Hello,

I've one problem with my Razer Blade 17 Pro (2019).
I've tried to find the Performance Mode in the Dolby Access App (wich is optimised by/for Razer.)
I want to use it with Dolby Atmos for Headphones (mine is a Astro Mixamp Pro TR + BD 300mmx),
but on my Razer Notebook is no Performance Mode Button.
Otherwise on other computers there ist the button (with the same Headset combination.)
Hope you can help me.

CasiOpeiA