SketchUp transitioned from permanent "Classic Licenses" (Serial Number + Auth Code) to a subscription-based model [3, 4]. If you have an old serial number, it may no longer work if it was upgraded to a newer version or a subscription [4]. Check Your Email:
: Open SketchUp Pro, go to the Help menu (Windows) or SketchUp menu (Mac), and select License . The serial number will be visible in the "Welcome to SketchUp" window. Sketchup Pro 2019 Serial Number And Authorization Code List
Ensure you are installing SketchUp Pro 2019 and not 2018 or 2020, as codes are version-specific. The serial number will be visible in the
Enter your and the email address used at the time of purchase. : Click Add License to authorize the software
: Click Add License to authorize the software. Important Licensing Policy Licence and authorization code - SketchUp Forums
: Check the inbox of the email address used at the time of purchase for your "Classic License" details.
