If you still have the software installed on an old computer, go to Help > License (Windows) or SketchUp > License (Mac). The license key will be partially visible there.
Many "connected" features in the 2019 version, such as the 3D Warehouse and Add Location , may no longer function because the underlying web technologies have been updated beyond what the 2019 engine can support. Troubleshooting Common Activation Issues Sketchup Pro 2019 License Key And Authorization Number
Ensure you are actually installing SketchUp Pro 2019. A 2018 or 2020 license key will not work on the 2019 version. If you still have the software installed on
Once you have your numbers ready, follow these steps to activate the program: What are the License Key and Authorization Number
This guide explains how these credentials work, how to find them, and what to do if you are having trouble activating your classic license. What are the License Key and Authorization Number?