It is highly recommended to use Mod Organizer 2 or Vortex to install this fix to avoid overwriting base game files and to manage the "Overwrite" folder effectively. Why This Fix is Necessary

Skyrim updates frequently break SKSE-dependent mods. Because FSMP interacts directly with the game's memory and CPU instructions, even a minor game update renders older versions of the physics engine unusable. This fix is the bridge for players who have chosen to "freeze" their game at version 1.6.353 to maintain mod stability. Skyrim Script Extender (SKSE)

To use this fix effectively, ensure the following environment is set up:

You must have the SKSE version corresponding to 1.6.353 (typically v2.1.5 ). You can verify your version by typing getskseversion in the game console.

Specifically designed for Skyrim SE/AE v1.6.353 .

is a performance-heavy physics library for Skyrim Special Edition that enables realistic movement for hair, clothing, and body parts. The "1.6.353 Fix" refers to a critical compatibility update for users on the specific version of the game associated with the early "Anniversary Edition" era. Overview of the 1.6.353 Fix