Given the information you've provided, I'll make a few educated guesses about what you might be looking for and offer some general guidance:
| Problem | Solution | |--------|----------| | "Installation package not found" | Redownload the file; the archive might be incomplete. | | ETS crashes on launch | Update your graphics drivers and disable hardware acceleration in ETS settings. | | Cannot detect KNX interface | Run ETS as Administrator and reinstall the interface driver from the Drivers folder inside the ETS directory. | | License activation fails | Check your system date/time. Deactivate VPN. Use a valid license key from KNX. | ets 57 4 download best
The primary source for any genuine ETS software is the [KNX Association website]. They offer time-limited demos (fully functional for a few weeks) and licensed versions. Given the information you've provided, I'll make a