Hello! The controllers should be detected on app launch without manually pressing the button, non detected controllers is really strange and points out to a ScreenBlasterVR-SteamVR communication issue. Make sure to connect to Meta Horizon link, then start SteamVR (from inside the headset is probably the best for quest headsets), Disable SteamVR Home in the steamVR settings and start ScreenBlasterVR at the end. Here the discord link for support by me and the community: https://discord.gg/hFbwB2CDRM