Authorizing a Classic License
Last updated: Apr 11, 2026•1 min read.
Classic Licenses can authorize specific versions of SketchUp. To authorize the version of SketchUp associated with your Classic License:
Download and install the version of SketchUp you wish to authorize. SketchUp only provides download links for supported versions.
Open SketchUp. When the Welcome page appears click Add Classic License.
In the License window click Add License .
Enter your User Name, Serial Number, and License Key.
Click OK.
Authorizing SketchUp Pro 2019 with a Classic License
Note : Classic Licenses can no longer be used to authorize new SketchUp installations of unsupported versions. For more information see our End of Support Policy .