If you are looking for a "fix" for technical errors in Camtasia, use these verified methods provided by TechSmith Support :
If the "Unable to Start Camtasia" error occurs, navigate to C:\Users\Public\TechSmith\Camtasia and delete the "License" folder, then reboot. Performance & Media Errors: Download fix camtasia rar
Restart your computer, right-click the official installer, and select "Run as administrator". If you are looking for a "fix" for