How can I reset Map Data?, New Game (+) style Options

[KD648]

Does anyone here know how to reset map data? What I mean by that, specifically, is reverting all data like self-switches, opened treasure chests and the like so each map is as it was when the game began, while still leaving variables and switches untouched.. My game features a time travel component (a lot like Radient Historia from what I've heard) and includes the ability to go through some dungeons more than once. When travelling back in time the characters retain their classes, levels and items and all that, but the story goes back to an earlier point in time. I'm simply going to reset the world each time as you can only "time travel" once you've reached one of the multiple endings, so resetting the entire world seems quicker and easier than trying to determine which chests were opened when. However, many important quest items and situations are controlled by switches and variables, so I need to leave those untouched. I imagine this is a scripting solution, but if anyone knows ANY kind of answer I'd love you forever!

Thanks so much in advance!