Using a "cracked" executable often results in a degraded experience compared to the official ETS 6 software Project Corruption:

The KNX Association offers several legitimate ways to use ETS6:

The latest update, version 6.3.0, focuses on enhanced security and simplified workflows: Secure Project Management Project Password Manager

allow you to extend a line without the rigid hierarchy of the past. Serial Number Programming : You can now assign addresses using serial numbers