SketchUp 2017 was the final version to offer both a free desktop version (SketchUp Make) and a "Classic" perpetual license (SketchUp Pro). As of , SketchUp officially discontinued the sale and renewal of these Classic Licenses in favor of subscription plans. Licensing Options and Availability Serial no and auth code for SU Pro 2017 - SketchUp Forums
Using SketchUp 2017 with a license key and authorization number provides several benefits, including: Sketchup 2017 License Key And Authorization Number
Search your inbox for an email from sketchupmail@sketchup.com . This original confirmation contains your serial number and authorization code. SketchUp 2017 was the final version to offer