It's pretty frustrating not to have any kind of changelog for
Blue Iris. I often see a bug, wonder if it's fixed when I install a new release but it's just guesswork without a changelog.
It doesn't need to be a full release note. Even the most basic changelog (e.g.
https://www.binisoft.org/changelog.txt) adds a lot of value and context.
I can't think of a single piece of software I pay for that doesn't have a decent changelog of some type. At least open source code you can see the commits directly on Github and they form a changelog of sorts.