Setting up the system button

I am using a old CV1 to develop a VR game using UE. While playing in the editor (VR Preview) the system button works and I can use it to reset the VR view.

I just created a build to test on other machines and found the system button does not work in a windows 64 build?

I tried to find information on this, but I keep getting Oculus quest information now and can’t find a lot on PC Oculus, CV1 or Rift.

Can someone point me to the documentation or perhaps a tutorial on how to get the system button working? My project is C++, but I’ll happily use blueprints for this bit if needed.