I don't have a pre 3.3.0 backup at this point for the project that is having problems. i tried to run the process you outlined for 3.3.4 but still having the same errors and missing scripts. the hexproject I'm having problems with, was updated with the older / incorrect process. given i don't have a pre 3.3.0 backup, I'm just going to call that project broken and recreate it. it was only a few days work and i should be able to take screenshots and rebuild it fairly quickly. it's for a tutorial i was creating for blox3, so redoing it again, so i can record it was in order anyway.
I've been able to update my main project, which i had followed the newer instructions and everything went fine. That was probably the more important project.....
let me know if you still want a copy of the plyoung directory or anything. but at this point i don't want you to have to waste anymore time on it, if I'm the only one having a problem.