Assuming you already own a valid license, here is the precise activation process.
Prerequisites:
Steps:
Troubleshooting "Invalid Serial Number" Error:
You are forced to upgrade to SketchUp Pro 2024/2025 (subscription) if: license sketchup 2017
If you are a hobbyist, you can legally use SketchUp Make 2017 for free. The original "1-year license" was a courtesy; in practice, after one year, the program displays a nag screen but remains functional. However, recent Windows updates may break activation.
Workaround for Make 2017 "License Expired" error: Assuming you already own a valid license, here
When SketchUp 2017 was current, users generally fell into two categories. Understanding which category you fall into is the first step in resolving licensing issues.