From ni.com, you can download or redownload NI software that you previously purchased. National Instruments

Supporting software developers through purchases contributes to the development of more tools and technologies. Downloading via torrent without paying for the software can deprive developers of revenue.

Pirated versions often lack critical updates, drivers, and technical support, which are vital for complex engineering projects. National Instruments Legitimate Alternatives and Official Sources Instead of a torrent, use official channels provided by National Instruments (NI)

Its stability and specific toolsets (like the batch-build dialog) were tailored for environments where software reliability is paramount. Risks of Torrenting Specialized Software