> EDIT: it does work as a zip, but I prefer using just files. Would make the update process so much easier
You can pass a .zip (with symlinks!) to butler — even from Windows. Does that work for you?
Or is that what you don't want to do? Windows just doesn't really support symlinks (it has junctions, which aren't quite the same thing, and it has proper symlinks if you have admin permissions — which isn't practical).
How are you generating the zip that you upload?