Okay so on windows it has a hidden folder that backs up the saves so you might need to go their. in your file explorer go to this PC then windows C:, then Users, click on your profile folder (the name is different on everyone's pc) and open it. now on the top click view and their should be a check box somewhere on top that says hidden items, you want to make sure that it has a checkmark so hidden items will be shown. then a folder called appdata should appear open that folder then open Roaming then RenPy then look for extracurricular activities. (I have added a image so you can find the view and hidden items check box). that file has a backup of your game saves so deleting this file or just moving it should solve your problem. If you get stuck at any point from my explanation I can try to help. ^-^