Why does the software not remember my key (it always launches as an evaluation)?
Snagit and Camtasia store license information in the registry and/or the local ProgramData folder on the computer. If your account does not have the required permission's to write to these locations, the next time the software is started it will revert to an evaluation copy. The workaround is to log in with administrator rights, install and input your key. During the installation be sure to select the For All Users option (if available).
In Windows Vista or 7 you may have to exit the program completely, then right click on the shortcut icon and select Run as Administrator. Then put your key in when prompted.
If that doesn't work then I take it up with techsmith support