1st this thread is for hotfix 3 which works

2nd yes hotfix 4 was rolled back and yes that buggers everything from save games to mods
ref = https://store.steampowered.com/news/app/1086940/view/6199820457255582871?l=english

Luke Skywalker: I don't, I don't believe it.
Yoda: That is why you failed.