Fixed: the Turn Off button now disconnects the controller's Bluetooth link while keeping the pairing — press PS to reconnect, no re-pairing, just like the PS5. (v2.3.0 wrongly unpaired the pad and was yanked.)
On Windows the app sends IOCTL_BTH_DISCONNECT_DEVICE to the local Bluetooth radio for each connected DualSense; the pad loses its host and powers itself off, but the bond is retained. macOS power-off is Phase 2 (not yet implemented); USB-connected pads cannot be powered off in software.
Download dualsense-mapper.exe, drop it in a folder, run. A fresh dualsense-mapper.json is auto-generated on first run.