If you're interested in a detailed paper on KNX simulators, here are some potential topics that might be covered:

Elias wasn't a pirate by nature; he was a desperate engineering student. The official KNX certification software cost more than his monthly rent, and his finals were a week away. He’d scoured the darker corners of the web, dodging "Download" buttons that were clearly malware, until he found a thread on a private forum.

You don't need a "crack" to learn KNX. The KNX Association and third-party developers offer legitimate ways to practice for free. 1. ETS6 Lite & Demo