if you want to suppress the "Do you want to keep or delete SnagIt Settings and Captures" prompt, during uninstall, then set the Property TSC_DATA_STORE=1 on the uninstall command line.
To disable Registration Dialog: Set RegistrationDialogHasShown to dword:00000001
You can download the msi and previous releases from http://www.techsmith.com/download/oldversions.asp
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