I have been a Camtasia subscriber for the past 3 years and noticed that prior versions are still on my drive. Can I delete those versions through Windows Control Panel without affecting the 2020 version?
If you have no reason to use the older versions you can uninstall them. It won't harm version 2020. There are some legacy callouts and other features that won't function in 2020. I believe there may be library items in 2018 that don't exist in newer versions. So if you intend on re-editing older projects with assets that won't work or exist in 2020, you may not want to delete older versions.