The game has something somewhere that saves whether a slot is used or not. When you delete demons, it doesn't actually delete them. It just writes something somewhere else that tells it the slot isn't used and it skips the data. I overwrote a byte I thought could have been it and it deleted my life stones. I backed up two, because medicine is the first item, ran a loop to write 999 over and over for a little and that was the result. Here is your save from earlier with some stuff edited. Some doesn't take effect until after its loaded. I wish I could speed this up for everyone, but I only have a few hours here and there to work on it.