Tried using it for OG skyrim. I use Mod Organizer for some mods (all graphical mods) and I did have it closed before opening bethini. I followed all of the steps and when I open Skyrim it will load into my save let me move for about half a second and then get stuck flipping back and forth between two frames. Even after doing the backup to restore before bethini, it still does this but I didn't do anything between using bethini for the first time and when I restored from the backup.
Windows 11, Ryzen 5 2600, 16 gb 3200mhz ram, Rx 580 8gb