Unofficial Skyrim Special Edition Patch 1.5.97 Page

Crucially, it leaves the updated 1.6 data files (master files) intact.

You might ask, "Why not just use the latest USSEP?" The answer lies in dependency. The USSEP is version-locked to the game executable (SkyrimSE.exe). A USSEP built for game version 1.6.640 (AE) will crash if used with game version 1.5.97. Unofficial Skyrim Special Edition Patch 1.5.97

For a long time, Skyrim SSE’s executable (SkyrimSE.exe) hovered around version 1.5.x. Mods, especially (Skyrim Script Extender), were stable. Then, in November 2021, Bethesda released the Anniversary Edition (AE) update, bumping the game to version 1.6.x. Crucially, it leaves the updated 1