With the latest version (Camtasia 2020), I actually had problems with an Imac with HighSierra, but from the first moment they answered and guided me to solve the problem, even before making the purchase (with some doubts I. Updates are issued periodically and new results might be added for this applications from our community. Software available on Windows and Mac.
SterJo Key Finder is a small and FREE application that can recover lost product keys. All you have to do is run the program and it will find the keys for you in a few seconds. The software is currently able to recover a large number of keys like Microsoft Windows, Microsoft Office, WinZip, Corel Draw, CyberLink PowerDVD, Nero, VMWare Workstation, Techsmith Camtasia Studio (weblink), AUTOCAD and many more.