: Use the SketchUp License Manager by entering the email address associated with the original purchase.
Finding a license key and authorization code depends on whether you are a legacy user or seeking a new copy. Since SketchUp 2016 is a "sunsetted" version, the process is different than it was at launch. For Legacy License Holders
Unlike modern versions where you simply sign in with a Trimble ID, the 2016 version required these manual entries to transition from "Trial Mode" to "Pro Mode." Where to Find Your Original License
SketchUp Make does not require a license key or authorization code. It does not expire. It is excellent for hobbyists and students.
A unique identifier that usually begins with a letter indicating the version and user type (e.g., QA , RA , or SA for SketchUp 2016 Pro).
Once you have your credentials, follow these steps to activate:
When the dialogue displays, navigate to the Classic tab and select Add Classic License .
A valid SketchUp 2016 Pro license key and authorization code can be obtained through the following channels:
If you need 3D modeling capabilities but cannot activate SketchUp 2016, consider these legitimate alternatives.
SketchUp 2016 is no longer supported. According to Trimble's policy, support ends for a version on January 31, three years after its release year (so 2016 support ended in 2019). While the software may still function, Trimble no longer provides technical support, bug fixes, or security updates for it.