now im running rubix 1.8.6 with sinful theme. I want to try black juice. I made a backup before installing sinful. To get back to before sinful do I need to wipe data/cache before restoring back up? Or restore then wipe before going to blackjuice? Or is there no need to wipe? unless its after number 2. Can I delete sinful zip folder from sd card to free up space?