If you're upgrading to a newer version of ChemDraw Pro or transferring your license to a new computer, you might need to reactivate your software using your serial number. Here's what you need to do:
If you have the software installed but need to enter the code, go to Help > Activate ChemDraw (Windows) or ChemDraw > Licensing Version Mismatch: serial number for chemdraw pro 120 2021