When deleting files before, I may have accidentally deleted a few files. When I entered the game, I found that I could see a lot of unlocked ghost information. I want to know if the new content is already in a certain file and can be played in advance

as far as I know, all the saves are in one file, save.data. If you don't want to mess with it, you can fix the data there. This file only contains what's currently in the game. At least, that's what I think.