https://blog.wongcw.com/2018/11/06/camtasia-studio-v2018-0-6-build-4019-9-1-2-build-3011%e5%ae%98%e7%b6%b2%e6%ad%a3%e5%bc%8f%e7%89%88%e9%99%84%e6%bc%a2%e5%8c%96%e8%a3%9c%e4%b8%81-%e5%b1%8f%e5%b9%95%e9%8c%84%e8%a3%bd%e5%b7%a5/