SSE Creation Kit Fixes https://www.nexusmods.com/skyrimspecialedition/mods/20061?tab=files. This mod puts an INI file in your Skyrim SE directory which allows you to enable/disable the auto facegen export upon saving. Go to skyrim64_test.ini and find "[CreationKit_FaceGen] - DisableAutoFaceGen=" and set to false if it isn't already, can't remember.