Skse 16640 Link ^hot^ Guide

For game version 1.6.640 , you specifically need SKSE64 version 2.2.3 . Using a newer or older version of SKSE will cause the game to crash on startup. How to Install SKSE 1.6.640 (Step-by-Step)

Are you planning to your game from the latest version to 1.6.640, or are you setting up a new mod list from scratch? skse 16640 link

SKSE requires Steam to be active in the background. Even though you aren't clicking "Play" in Steam, the app must be open. Essential Next Steps For game version 1