You can use the official SketchUp License Lookup tool on their website. You will need the email address used for the original purchase. Authorizing SketchUp Pro 2020: Step-by-Step
A Classic license typically allows for two active installations (e.g., a desktop and a laptop). If you get a "Too many activations" error, you must from one of your old machines while connected to the internet to "free up" the seat for your new computer. The Shift to Subscription You can use the official SketchUp License Lookup
Copy and paste your Serial Number and Authorization Number exactly as they appear in your email. Activate: Click "Add License" to complete the process. Common Issues & Troubleshooting "Invalid License" Errors If you get a "Too many activations" error,
Ensure you have the SketchUp Pro 2020 installer. License keys are version-specific; a 2020 key will not work on 2019 or 2021 versions. What is a SketchUp Classic License?
If you are trying to reinstall this specific version or move it to a new machine, understanding how the work is essential. What is a SketchUp Classic License?