While Ubiquiti no longer provides a direct link on their main landing page, you may find the software through the following official and alternative channels: Ubiquiti Official Utilities : You can attempt to search the official Ubiquiti Search Tool
The most stable and widely recommended version remains . It offers a perfect balance between legacy hardware support and modern operating system compatibility. ubnt discovery 251 download link
To use the v2.5.1 Java tool, your system must meet specific criteria: While Ubiquiti no longer provides a direct link