In general, NI Measurement & Automation Explorer (MAX) is installed automatically with the driver of each hardware device, since it is a tool used to configure and use NI hardware devices. NI-MAX can't be installed separately, because doing so can affect other software and driver's functionality.
This article discusses how to get
NI Measurement and Automation Explorer (NI MAX), by installing the corresponding driver or any other software that installs NI-MAX. Also, the article discusses the limitations of downgrading NI-MAX, and why this is not recommended.
Note: NI MAX is only supported on Windows and MacOS, not Linux, and cannot be downloaded by itself. It is included with all NI drivers (NI-VISA, NI-DAQmx etc.) and NI System Configuration.