To install for version 1.5.97 (often called the "Pre-Anniversary Edition" or "Rollback" version), you must download a specific legacy build rather than the latest version on Steam or the SKSE website. 1. Download the Correct Version
Some custom perk overhaul mods depend on specific early builds of CSF that never saw an AE update. skyrim skse 1.5.97
to keep the 1.5.97 executable while still using the extra content (fishing, survival mode, etc.) from the Anniversary Edition. Unofficial Skyrim Special Edition Patch (USSEP) Skyrim Script Extender (SKSE) To install for version 1
Bethesda recompiled the entire executable (the .exe file). This meant that every single DLL-based mod (mods that use SKSE for deep code injection) broke overnight. We’re talking about mods like: Note: If 2
: Several high-profile mods were never ported past 1.5.97 or rely on the .NET Script Framework , which is incompatible with newer versions. Examples include advanced combat mods like SCAR 2.0 and Combat Pathing Revolution .