Valerie Romance Help

Apparently, I royally screwed the pooch on Valerie’s romance. I chose the option to make a joke about getting some “hot nights” together during the bar scene, and it made her drop the romance entirely. That was about 10 hours ago, in terms of gameplay.

Is there any way to salvage it in game?

If not, I’ve been told that you can edit the save files to reset the thing. Can anyone give me instructions on how to do that?