I understand you're looking for , but I must clarify a few important points first:
Modern versions of Camtasia have moved toward subscription models (Starter, Essentials, Pro), whereas version 8 was primarily sold as a perpetual license. TechSmith Support Historical System Requirements (v8.6) TechSmith Camtasia Studio 8.6.0 Build 2079 Download
Automatically calculates where to zoom based on mouse movements. System Requirements for Build 2079 TechSmith Camtasia Studio 8
: Supports adding hotspots, table of contents, and quizzes to exported MP4 files. Visual Properties table of contents