If you actually own a legitimate perpetual license for SketchUp Pro 2017 (from before the subscription switch), Trimble provides a workaround since the servers are down.

: It was the last version to offer a Classic License , allowing for a one-time purchase rather than a recurring annual fee.

, which were originally sent to the email address used at the time of purchase.

The offline authorization algorithm uses a cryptographic hash of your computer’s MAC address, CPU ID, and motherboard serial. A random number cannot generate a valid response. It is mathematically impossible.