Set the original Steam game to "Only update when I launch it" and never launch it through Steam again. Essential Companion: Unofficial Patch Even on v1.10.163, you should use the Unofficial Fallout 4 Patch (UFO4P) . Ensure you download the pre-Next-Gen version
Edit Fallout4Custom.ini (in your portable folder): fallout 4 patch 110163 portable
: Open the Steam console (Win+R, then type steam://open/console ) and use the download_depot command to grab the 1.10.163 files. Set the original Steam game to "Only update