I have maintained the registry for over 15 years now, and for the last couple of years we have had an excellent team of co-maintainers who took on a lot of the work. However, there are some much needed improvements which are hard to carry out based on the current platform, and the work due to abuse is growing. We cannot continue this on our own, unfortunately.
The script implements Dan Margulis' concept, The Bigger Hammer, from his book Modern Photoshop Color Workflow, Chapter 10. Please consult this book for examples and details on using the script. The script is useful for enhancing details in highlights and/or shadows.