: A single-user Classic License can generally be authorized on up to two devices End of Support
: Log in to the Trimble Account Management Portal to view your active products and license details. How to Authorize SketchUp Pro 2018
Finding your SketchUp Pro 2018 license details depends on whether you have an existing legitimate classic license or are attempting a new activation. uses a "Classic License" system (Serial Number and Authorization Code) rather than the modern sign-in subscription model used for current versions. 1. How to Find Your 2018 License Details