This is the current standard. It does not use serial numbers; instead, you activate it by signing in with your email (Trimble ID). Key Facts for SketchUp Pro 2020/2021 Licenses
: While some users received a 2021 classic license if their Maintenance & Support (M&S) plan was active during the transition, most users moved to subscriptions. This is the current standard
: If you've lost your license key or authorization number, contact SketchUp's support team or your reseller. They can provide guidance on how to retrieve or recover your information. : If you've lost your license key or
Most "keygen" or "crack" downloads contain hidden Trojans or ransomware. Remove from Old Devices: SketchUp Pro classic licenses
Remove from Old Devices: SketchUp Pro classic licenses typically allow for two installations (e.g., a desktop and a laptop). If you are moving to a new machine, open SketchUp on the old one, go to Help > License, and click "Remove License."
If you had an active Maintenance & Support plan when SketchUp 2021 was released, you were likely eligible for a free upgrade to a 2021 Classic license. However, if your plan expired before the 2021 release, your 2020 key remains locked to the 2020 version. How to Find Your 2020 License Information
: 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