In recent years, Trimble (the developers of SketchUp) has transitioned almost entirely away from the traditional "Serial Number and Authorization Code" model.
Understanding how the SketchUp 2025 serial number and authorization code system works is essential for a smooth installation and to avoid common activation pitfalls. The Shift from Classic Licensing to Subscriptions sketchup 2025 serial number and authorization code
Most licenses allow for two installations (e.g., a desktop and a laptop). If you've reached your limit, you must "Remove License" from an old machine. In recent years, Trimble (the developers of SketchUp)