Hmmm, I don't even know how to do this without breaking anything. Since the folder and file structure has been changed, transferring all the changes will be incredibly difficult. Even if you try to simply replace every existing file, it will soon create problems and errors.
What I can tell you is that this update isn't particularly critical, you can skip it and just continue working with your current version of Horror Kit.
The update I released simply changes the folder hierarchy and adds natural prefixes to all files, along with a few minor tweaks. I think you can just skip it update. Sorry for the inconvenience, these changes were supposed to be in place before this update.