Before downloading, ensure your host machine meets the minimum requirements:

Many users download the controller, install it, and then complain that their access points are "offline." The usual culprit is . The controller identifies your APs by the IP address of the machine running the software. If your computer gets a new IP via DHCP, the APs cannot find the controller. The solution? Either set a static IP for your controller machine or run the "Set-Inform" command via SSH on the APs to point them to the correct address.