In the Minecraft Launcher, create a new installation and select release Wurst-v6.6-MC1.11 from the version dropdown. Security Warning
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.
Features like Nuker for rapid block destruction, X-Ray for finding ores, and Flight to navigate the world easily.