Today I upgraded from Camtasia 8.3 to Camtasia 8.5 and ran into an issue with my audio settings only recording to the left speaker. I know that my microphone only records in mono so this was not surprising. What was surprising is that the audio settings for the Camtasia Recorder were greyed out when using the TREC format. In Camtasia 8.3 I could tell the Camtasia Recorder to record in mono so that it would be in both left and right speakers.