I've just discoverd how to edit your save, for it to save on the cloud you have to be ingame while the changes take effect. (only tried manipulating exp and gil so far)
This might be old but you should be able to make a working trainer...
I see, hopefully youre able to do it today and also where am i suppose to put the files?
Im only seeing:ff7input.cfg, ff7video.cfg, user_(numbers) and update-temp.