An authorization code from a different year (like 2015 or 2017) will not work. Each annual version requires its own unique pairing.
Use the SketchUp License Manager to search for your code using the email address and serial number associated with your original purchase. sketchup 2016 serial number and authorization code
A single-user license allows installation on up to two computers, but only one instance can be used at a time. How to Authorize SketchUp Pro 2016 Single user license 2016 SketchUp pro An authorization code from a different year (like
If you previously purchased a perpetual license for SketchUp Pro 2016, you can retrieve your details through these official channels: A single-user license allows installation on up to
Search your inbox for a message from sketchupmail@sketchup.com . This email typically contains your specific serial number and the unique authorization code required for that version.
Locating your is a common task for users maintaining "Classic" perpetual licenses in an era of subscription-based software. How to Retrieve Your 2016 License Details