When the CAMREC file is added to the timeline in Camtasia 2018, Camtasia may hang while editing and exporting.
This is a known issue that is fixed in Camtasia 2018.0.6 and later. Select Help > Check for Updates in Camtasia to install the latest version.
Workaround for Earlier Versions
This problem occurs when editing CAMREC files in Camtasia 2018. The best workaround is to finish older projects in Camtasia Studio 8 or Camtasia 9 and start new projects in Camtasia 2018.