Ubnt Discovery-v2 4.1 Free -free- Download //free\\

If you specifically need the legacy standalone tool for older hardware:

A: Partially. The UDM appears, but newer UniFi OS devices prefer a Layer 3 discovery method. For UDM, use the mobile app or SSH. Ubnt Discovery-v2 4.1 Free -FREE- Download

Ubiquiti maintains a standalone discovery tool that is free to download from their official website. It is lightweight and safe. If you specifically need the legacy standalone tool