I have a 2018 Macbook Pro with Camtasia 2019 installed. Rendering a 35 minute 4K video. Looking at Activity Monitor, Camtasia is taking 4.3% of CPU, 5.52GB Ram. Just 4.3% CPU with 90% of my CPU idle looks like Camtasia is not taking advantage of as much CPU as it can to render the video. Why cannot Camtasia thrash the CPU to get the job done quicker?