Once you have your (typically starts with "S") and Authorization Code , follow these steps:

If you still have your serial number but lost the authorization code, you can use the official SketchUp License Manager to have the info resent.

Modern versions of SketchUp (2021+) no longer use serial numbers. Instead, they authorize via a Trimble ID (email login).

This is the free version for personal use. It does not require a license key. After a 30-day trial of the "Pro" features, you simply click an "I Agree" button to continue using the free version indefinitely. Troubleshooting Common Issues