I found a new video editor to replace Camtasia: DaVinci Resolve 20.
It’s more stable than Camtasia and it’s easy to edit video with it.
I’m still learning how to use it, but so far I’m more than happy with it.

What I like is that after many cuts, it still remains stable, something I never got with Camtasia.
With clips longer than 10 minutes, Camtasia started to become unstable and I had to keep saving the project every 2-3 minutes to make sure it doesn’t crash.
What I like about DaVinci Resolve is that it has both a Cut timeline and also an Edit timeline.
I’m looking forward to becoming proficient with it.