My friend's server automatically changed to 1.19.4 from 1.19.3, and I can't use forge or optifine since the versions are not out. When it changed to 1.19.4, my friend tried to change it back but it wouldn't change. In general, I have 2 questions.
1) Can he change it back?
2) If he changes it back, will our progess save?
Thanks