: This is the final version designed natively for 1.5.97 before the transition to AE (version 1.6+). It is often archived or linked through community discussions like those on Reddit .
Many users on 1.5.97 use the Best of Both Worlds version of the Downgrade Patcher. This keeps the Anniversary Edition .esm master files (which have new Creation Club content) but downgrades the .exe to 1.5.97. skyrim ussep 1.5.97
Using a modern USSEP on a 1.5.97 game will cause immediate issues, as the new patch expects "Creation Club" files (like Fishing and Saints & Seducers) to be present as master files. How to Get USSEP for 1.5.97 If you have downgraded your game, you need USSEP version 4.2.5b : This is the final version designed natively for 1