Skyrim Ussep 1.5.97 Page

Search reliable community archival threads (such as the Skyrim Mods Reddit community wiki) for the direct Nexus Mods download ID for USSEP version 4.2.5b. Install this file manually via your Mod Organizer 2 (MO2) or Vortex profile. Do not click "Update" if your mod manager flags it. Step 4: Install Essential Backports

This tool doesn't revert your entire game; it cleverly downgrades the game's essential executables (like SkyrimSE.exe and core DLLs) to 1.5.97 but keeps the newer master files and Creation Club content from the Anniversary Edition. This approach allows you to enjoy the new content while maintaining compatibility with the older SKSE mods. skyrim ussep 1.5.97