For all out there, who want their earlyer Version of Skyrim SE back, here is one of the best Instructions how you can go easy peasy back to SKYRIM SE 1.5.97 or whatever Version you need! I followed this Tutorial and i got my old SKYRIM SE EXE BACK in 3 minutes!!! DONT NEVER EVER START AFTER YOU GOT THE OLD EXE BACK WITH STEAM!!!!! START ONLY WITH SKSE Version you NEED!!!  I hope this helps many of you as it helped me! ENJOY