You can have both installed at the same time so you can upgrade, but to continue collaborating with Camtasia 2019 users you should continue to use Camtasia 2019 when working on those shared projects.
But like Clint said, you cannot open newer version projects in older ones. The other way it works, though. I've upgraded a lot of projects in 2020 and they have had no problems so far.
Accomplished with a simple edit to the tscproj file [which is just a Jason text file]
How To Down Convert Camtasia 2020 Project To Camtasia 2019 Or Camtasia 2018 Or Camtasia 9 2020-05-07
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Strongly Discouraged By TechSmith
New version features will not work in downgraded projects
I've downgraded hundreds of projects without any issues
The workflow you’ve applied to 100’s of projects is very narrow in scope.
Plus, it sounds to like you may have encountered a bug or flaw in Camtasia 2018 or 2019?
Perhaps your operating system is missing a codec, critical update or something to that effect? Or your particular system is simply antiquated, defective or the hardware will not and cannot fully support the newest versions.
To the best of my knowledge, a medias anchor point, the maximum outside canvas bounds “Dimensions”, etc., share identical parameters starting with version 9 through 2020.
It’s quite possible you’re encountering an “Actual” incompatibility issue between versions 2019 & 2018?
Which should suggest hacking backwards or forwards between versions is going to be risky business for anyone that travels the same road.
Based on your description. You’re updating 100’s of older “Existing 2018 projects” to Camtasia 2019.
Modifying them, then reverse engineering them to open in 2018 again.
From where I sit, that workflow is vastly different than starting a project in Camtasia 2020.
Then packing it up and sending it off to collaborators elsewhere. To hack backwards for further editing in 2019. Or any older version for that matter.
since you cannot let sleeping dogs lie ...
I'll restate for clarity
I have NEVER experienced an issue when down converting any candidate project
But I have experienced issues when upgrading projects from earlier versions
Example - Camtasia 2020 no longer supports earlier style callouts; this has caused me to have to remake many Library assets, and, to have to patch many earlier projects
Another benefit of down converting is the ability to edit in latest version, while simultaneously producing in earlier version; this let's you double-team Camtasia
You can also have the 2 versions producing at the same time; this can be a big help when there are pressing time schedules
let's move on ...