There are some bugs in Skala Color that we don’t think we can fix while keeping it a macOS color picker. The solution is probably to turn it into a full Mac app as a compete reboot that adds lots of cool new features. However, we don’t have time to do it right now. If you’d like Skala Color as a Mac app, please let us know.
If you really, really want to download the latest version, you can do so here: Download Skala Color 2.1.