Long time no update, since I've been busy on other projects. Anyway, this one is a very good starting point for Windows users.
Note that you can skip some megabytes of RAM when using the "-noui" option. Then, RepoZ is running in the background to enhance the explorer window titles only.
Mac users won't be very happy because it's not possible to scan for file changes over the whole disk. I might look for a solution in future but it's not really on my agenda, yet.