I have been using Camtasia 8 for some time, but on a 4K system, it does not display properly. I assume it has to do with scaling, but I don't want to change the scaling just to use Camtasia. I decided to try V. 2018. It displays fine, but doesn't run. I downloaded a sample project and loaded it. Click on the arrow - nothing happens. The tool itself seems to work, but it doesn't animate. Codec problem? Who knows? I certainly don't think it is ready for prime time.