Look for emails from sketchupmail@sketchup.com .
Requires a Serial Number and an Authorization Code . Sketchup 2020 License Key And Authorization Number
If you own a perpetual license for SketchUp 2020, your license key information was sent to the email address used during purchase. Look for emails from sketchupmail@sketchup
In the window, click the Add Classic License tab. Click Add License . Sketchup 2020 License Key And Authorization Number