Navigate to “Path_To_Install\UE_version\Engine\Plugins\Runtime\Steam\SteamVR”
open “SteamVR.uplugin”
edit line 13 “EnabledByDefault”: false,
save
profit.
All new projects won’t launch with it enabled.
IIRC, you can also move the steamVR.exe to another folder, so anyone developing for VR that needs the plugin but hates having it auto-launch, can then just manually launch the moved steamVR.exe when they want to test.
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