Interestingly enough I am having the same issue now, I edited out some stuff using Notepad++ and suddenly my munge is "broken" somehow, it doesn't apply changes I make to the level, I re-made the level from scratch and I am having the same issue, it munges and copies everything but is not changing anything I make on zeroeditor, if reinstalling doesn't work I may need to clean the PC's registry or something.
EDIT: Fixed for now, I messed up with the CPs and didn't move them properly so this may have been a false alarm.
EDIT: Fixed for now, I messed up with the CPs and didn't move them properly so this may have been a false alarm.