How should I activate 'Immerse with VST AmbiDecoder'?

In order to activate Immerse, you will need to download the 'Steinberg Download Assistant.' Then, you can find Immerse with VST Ambidecoder app under the "Complementary Product" section. Once your installation is completed, you will be able to enter your license code in the app and activate Immerse. Please check out this tutorial during your setup.