I've really tried to persist with Captivate over the years, loving the relative ease of creation of responsively designed content.
However for the past few months I've been unable to access any of the content created in Captivate 2019 on my Mac (and not I haven't upgraded to BigSur yet.
The benefits that were there years ago aren't advanteages any more, the reliance on flash when this has been retired, the tired old user interface and the enormous complexity of doing simple things... I'm done.
It may be more powerful, but in terms of day to day usability i can no longer justify the effort and so me and my team will join the groiwing number of users of a competitive more articulate web-based soluition that always works on my mac and anyone can use.