Dear Customer, Thanks a lot for your support and purchasing Elegoo products. We keep updating our tutorialso the tutorial in the CD may not be the latest version. If you need the latest tutorial, you may download the tutorial from www.elegoo.com We apologize for the inconvenience caused and should you have additional questions or problems during testing, please feel free to contact us at service@elegoo.com or euservice@elegoo.com. Thanks and best regards Elegoo Support Team