and linked to a specific purchase [1, 3]. Sharing or using public codes often leads to "Invalid License" errors because those keys have likely been blocked by Trimble [2].
If you are trying to activate the software, here is the best way to handle it: 1. Check Your Email Sketchup Pro 2016 License Key And Authorization Number
on their official site. You will need your serial number or the email address used for the purchase to retrieve your codes [1]. 3. Consider the Free Version and linked to a specific purchase [1, 3]