@frozenorangejuic yes that is what i did. i emptied a world. i had no idea it could cause problems. as a little suggestion, maybe we could put a note in the original post of this thread so people know of the danger? unless that is already there and i just did not see it... hm. since i won't go back to start if i can at all avoid it, i think i will just stick with my plan of regular backups (not in-game) for now. next time i know!
is there something that mastercontroller may be able to do for me now, after i already played in that world? though i think mastercontroller usually breaks my game. it happened twice and i stopped using it. though it may also have been overwatch. one of the two.