Yes, editing the design of the QR Code does not affect the functionality of the old QR Code design. Scanova QR Code Generator allows you to add design to the QR Codes that you generate making the QR Codes look 'personalized' to your brand.
Here is a detailed article explaining how you can add designs to your QR Codes: How to add design to QR Codes
So, if you have used a QR Code image for different use cases and want to change the design in future, you can do it and that will not affect the already used QR Code images. Both of the QR Code designs will work simultaneously.
If you still have unanswered questions related to this topic, you can reach out to our support team at firstname.lastname@example.org.