Board Thread:Questions and Answers/@comment-31519902-20170314182929/@comment-27701762-20170314201407

Someone else will be able to help with finding a way to restore the save file, but I should just note that you don't need to redo Neutral and True Pacifist. You can just rebegin your Genocide run. If you know what you're doing, it should take you somewhere around 30 minutes to get back to where you were.