: Many users use the Downgrade Patcher with the "Best of Both Worlds" option. This keeps the 1.5.97 executable for mod compatibility while retaining the updated .esm files, allowing the latest USSEP to function.
: Essential engine-level mods like .NET Script Framework and certain animation plugins (e.g., older versions of DAR) only function on 1.5.97. skyrim ussep 1.5.97
Despite being several years old, 1.5.97 is considered the "gold standard" for heavy modding because: Plugin Stability : It has the widest support for SKSE-dependent mods that haven't been updated for the AE (1.6+) codebase. NetScriptFramework : Essential mods like No Grass In Objects : Many users use the Downgrade Patcher with
However, you can still get USSEP 1.5.97 compatibility. Here is how: skyrim ussep 1.5.97