Camtasia Studio 6.03 Files load from Web, but not from local source. However, the .swf flash files load locally, but not from browser. All worked in the past, and the files have not changed. Up to date with Flash player and Java script.
I've seen similar issues with trying to view old productions locally; most do not work anymore
I understand, per tech support, that this is due to browser security updates
my suggestion ...
if you have legacy videos that you want to be able to view locally, and you still have those projects, upgrade the projects and produce again; if you no longer have the zip archived projects, update them using CS9 to create a new production from the surviving MP4
if those projects have interactive content [TOC, captions, hotspots, quizzes], you can extract that info from the config.xml, or the MP4 itself; then, you can rebuilt the projects and get a production with all the original interactive items intact