Really? I intended it to allowed for that. The Change names option isn't supposed to show up until after you finish the intro or play a save from 0.2, but the Modify relations should be up from the minute you load any save or hit new game. Backwards save incompatiblity is a bug as far as I'm concerned, so if you do have trouble shoot me a save in PM and I'll check it out.
Maybe it was a misunderstanding on my part. When I made the modified relationship changes, I swore it talked about if you rewound the game after making the changes, the changes wouldn't show up. The very fact that you have to be in game and can't change those setting from the main menu seems to imply to me that it is stored on a save and not on in the general settings(but im not a game dev).
And perhaps I wasn't clear, when i mentioned retroactive and old saves, I wasn't refering to old versions(I know there is save incompatibility with a lot of older version renpy games). I meant games that had already been started and saved before making the relationship modifications, for example since a lot of renpy games don't have galleries or scene replays, so I tend to use save slots before just before sex scenes so I can go back to them at a later date if I want. So if I made those saves before making the relationship changes, and loaded them up again, I was under the impression that the relationship changes wouldn't be reflected in those saves.