> The free version has been a boon for many, but some are using it in ways it was not intended, and we felt Kx was exposing itself to a legal risk because the free version is unsupported.

I wonder what do they mean? What's not intended way and what's a legal risk they are talking about?

> HOWEVER, if you downloaded the free version of 32-bit kdb+ prior to September 13, 2015, you are free to use it for commercial use.

I don't understand how someone can prove that he downloaded it prior to September 13. Those are extremely confusing terms.