Skyrim Update 1.6.640 !!top!! -

If you need to revert to a pre-Anniversary Edition state (such as version 1.5.97, which many legacy mods require), you can use the available on the Nexus Mods website. Alternatively, you can use the Steam Console to manually download the old depots for SkyrimSE.exe and replace your current file.

If you are encountering crashes or downloading mods, you must verify your exact game executable version.

Understanding Skyrim Update 1.6.640: Legacy, Compatibility, and Modding Impact skyrim update 1.6.640

Any mod relying on specific C++ plugins (like Address Library or .NET Script Framework) required immediate updates from their respective authors.

Change Automatic Updates to:

: As with most executable updates, it broke the Skyrim Script Extender (SKSE64) and all associated DLL-based plugins. SKSE was quickly updated to version 2.2.1 to support this build .

: Never open the game through Steam. Always launch your game using skse64_loader.exe through your mod manager. Steam will see the game running but will not trigger an update download. If you need to revert to a pre-Anniversary

If you want to keep your game locked at 1.6.640, or downgrade a newer version of Skyrim to match it, you have two primary methods. Method 1: The Downgrade Patcher

Fixed errors that were preventing players from purchasing the Nix-Hound pet and specific horse armor in non-English versions of the game. Understanding Skyrim Update 1