When you buy a Native Instruments Komplete Audio 6, it currently comes with some extra software, like Komplete Elements. The problem is the download (currently in Q1 2018) is tricky.
To download Komplete Elements, you need to download the ISO. Yes, EVEN IF YOU ARE ON WINDOWS! I know, I know, that d/l says MAC, but you still need it even on Windows because that is your content.
Hopefully, Native Instruments will change the labeling at some point to make it more clear, but as of now, you can see how it’s done in the video. Enjoy.