I made a working windows version from your code. Works just fine.
But when i put the edited save file back on my ipad it wont save anymore, It loads up and shows all the changes i made just fine. But next time after fallout have been closed (not hidden) it loads exactly the same as right after my changes. Nothing i did after the edit have been saved. same amount of coins and no room improvments.
I changed coins, that seems to work.
I changed stats of a toon, that seems to work.
I tried to change the amount of lunchboxes, that never worked...it still showed the same as before the edit.
Any tips of what i might be doing wrong?