This version was a critical release following the major "Anniversary Edition" update. It allows complex mods that require custom scripting—like SkyUI or legacy DLL-based plugins —to function with the 1.6.342 version of the game engine.
: Because this version of the game changed how scripts interact with the engine, many older mods that relied on specific "address libraries" had to be updated. Players often choose to use a Downgrade Patcher to revert to version 1.5.97 to maintain compatibility with a wider range of older mods. How to Check Your Current Setup skse 16342
Skyrim Script Extender (SKSE) version 2.1.5 was specifically designed for Skyrim Special Edition version 1.6.342 This version was a critical release following the