: If SketchUp Pro 2020 is already installed and active on a computer, you can view your serial number by going to Help > License (Windows) or SketchUp > License Authorizing SketchUp Pro 2020
often need to re-authorize or manage their Classic License Key and Authorization Number, particularly if they have upgraded hardware or are managing licenses first activated around 2021.
I can also help you find to SketchUp if you are looking for professional 3D modeling tools without a subscription fee.
: Look for an email from sketchupmail@sketchup.com . : If SketchUp Pro 2020 is already installed
Students and educators may be eligible for free or discounted educational licenses through Trimble's education program.
When you enter a license key, the software generates a unique hardware ID based on your computer’s motherboard and network card. The activation server locks the license to that specific machine.
If your license shows as [On Hold] in the License Manager, it may have been upgraded. In some cases, users who upgraded from 2020 to 2021 found that their 2020 license was marked as "On Hold" and could no longer be used, even for the 2020 version. This is because the license was permanently associated with the newer version. Students and educators may be eligible for free
: SketchUp no longer offers technical support or renewals for Classic Licenses. Web-based services like the 3D Warehouse or Extension Warehouse may also have limited or no functionality in these older versions. Understanding Your Classic License - Sketchup Help
Classic licenses usually allow for two installations (e.g., a desktop and a laptop) provided they aren't used simultaneously.
: Visit the SketchUp License Manager and enter your serial number and the email address used for the purchase. If your license shows as [On Hold] in
Open the application. On the , click on the License tab. Select Add Classic License .
: A unique multi-digit code generated specifically to match that serial number. The 2020 and 2021 Timeline Shift
If your legacy SketchUp Pro 2020 environment is no longer meeting your hardware needs—or if your operating system forces an upgrade that makes SketchUp 2020 unstable—transitioning to a modern ecosystem is straightforward.