The installation for Wurst 1.11 typically followed the "legacy" method before the widespread adoption of the Fabric loader for older versions:
In the Minecraft Launcher, create a new installation and select release Wurst-v6.6-MC1.11 from the version dropdown. Security Warning Download Wurst v6.6 MC1.11
Version 6.6 improved the logic for AutoSteal, making chest looting faster and more reliable. How to Install (Standard Method) The installation for Wurst 1
Create a new folder named Wurst-v6.6-MC1.11 and place the client's JAR and JSON files inside. Wurst v6
Wurst v6.6 for Minecraft 1.11 was a significant maintenance and feature update released in early 2017, shortly after the transition to the Minecraft 1.11 "Exploration Update." This version of the Wurst Client was part of the stable v6 series, which focused on refining the user interface and expanding combat and utility features.