I hope I didn't upset you in a way by publishing this editor... You do great work in continuing Tobe's work on that game with some nice and fresh ideas. Really enjoy the work!I generally either add new save information onto the end of the save or within the girl objects so I expect forward compatitibility.
The only thing I ask of you is, if you see a stat that doesn't seem to be referenced in game, that's either something for future work I'm considering or it's something Tobe put in that is unused that I might find a way to incorporate--please don't work with those. It won't break anything, but there's no guarantee that it'll become 'a thing' either.
It's your games though, you do you.
About compability: it should work with future developments, however, the new data for new version will be lost after editing. The tool reads and completely rewrites the save file, so anything it doesn't know about will be lost. But I might update if it comes to that.
I just saw that "affection" is not used in game so far. That's what you refer to, I think...
But there are other ways this editor might break game mechanics: e.g. you could set any girl as ASSISTANT, or you can remove policies that are requirements for others that you've already purchased. I don't know if the game might break in some way when you do that. But that's anyone's own risk if he wants to bypass some mechanics.
As I said, just a quick and dirty tool to change some attributes I found usefull...