The Maschine Factory Library is a proprietary collection. While updates to the software are often available via the NI service center for owners, the full library is generally tied to a hardware purchase or a Komplete bundle license.
While the 1.6.2 is often available for free to existing registered owners via the Native Instruments service center or website, the full Maschine software and its 6GB+ Factory Library are proprietary products. The Maschine Factory Library is a proprietary collection