I'm working on the regular version and it corrupted my save as well. I was able to figure out where Mirian is located at though. It's on line 5690 for me in Advanced mode. I can see it change when I purchase stuff but when I edit the numbers on the Game Data file they never change. What's interesting is that when I touch the Quick Save Data I end up with a corrupted file.
How much did you give yourself? 9999 or lower? Also it's says mine is at 5710