This is exactly the functionality I've been waiting for! Before finding this add-on, I had resigned myself to manually changing the File Output paths in the Compositor for every animation cut or sequence change. This was necessary because, in native Blender, the Compositor does not yet support String-type nodes for dynamic path input.

This tool is a massive quality-of-life and workflow improvement, saving a significant amount of manual effort. Thank you so much for creating this, and I also deeply appreciate the inclusion of Japanese language support!