When i'm trying to import a .wav audio file that was exported from a .trec recording to a track it makes Camtasia close in a crash with no warning! , this never happen on Camtasia 9, please release an update as soon as you can.
I would suggest some research on your part is required here. Does the system Event Log show any errors at the exact time of the crash? What was reported? I suspect that there would be dozens of other reports here if this was a common bug.
I just tested the described issue and could not reproduce the behavior; with a narrated trec capture on timeline, I exported audio only; next, in a new project, I imported that wav and put on timeline; no problems
recommend you contact free tech support about the problem