How to disable auto-SteamVR launch on UE4 launch?

Development Platform & Builds XR Development
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The way I’ve stopped SteamVR from auto-launching with different applications is by:

  1. Move the SteamVR folder away from inside “…/Steam/steamapps/common”, since applications can’t launch what they can’t find.
  2. Whenever you want to use VR, start it preemptively, using “…/SteamVR/bin/win64/vrstartup.exe” (or whichever OS you have), I also recommend creating a shortcut.