msiexec.exe /i "camtasia.msi" /qn COMPANYNAME="Your Company" USERNAME="Authorized User" TSC_SOFTWARE_KEY="xxxxx-xxxxx-xxxxx-xxxxx-xxxxx" TSC_LICENSEMODE="Full"
Open the .MSI file in Orca, and edit the "Property" table to fill in TSC_SOFTWARE_KEY with your license key, then fill in TSC_SOFTWARE_USER with your company name, and change TSC_LICENSEMODE to "Full". Then save the .MSI or save the changes as a transform (.MST). Either way works fine.
To avoid "your trial has expired" error/bug when launching the recorder:
msiexec.exe /i "camtasia.msi" /qn TSC_SOFTWARE_USER="Your Company" USERNAME="Authorized User" TSC_SOFTWARE_KEY="xxxxx-xxxxx-xxxxx-xxxxx-xxxxx" TSC_LICENSEMODE="Full"
http://techsmith.custhelp.com/app/answers/detail/a_id/3160/kw/trial%20expired
To silently remove Camtasia Studio 7.0.1, just run the msiexec /x command with TSC_KEEP_LIBRARY=1 in the parameters.
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