F4SE is highly version-sensitive. Every time Bethesda alters the game's executable file ( Fallout4.exe ), F4SE breaks. Because version 1.10.163 was left untouched for years, the vast majority of advanced mods on platforms like Nexus Mods were hardcoded to work exclusively with it. What the Next-Gen Update Broke

Included the culmination of all post-launch bug fixes for the game's original engine code.

If you can, purchase Fallout 4 Game of the Year Edition on GOG (Good Old Games). This platform provides the game as an offline installer, and it has never been updated to the "Next-Gen" broken state. It is the genuine 1.10.163 experience out of the box.

Once finished, Steam will give you a file path showing where the files were saved (usually inside Steam\ubuntu12_32\steamapps\content\app_377160 ).