Really considering dropping it just because of this one issue. Mainly because it prevents the modpack from being a simple one-click install as it should be.
I don't believe there is a way to download the correct version from in-game, meaning every user would have to manually download and install the correct version of Metal and Stars (which is already a lot to ask for, let alone doing the unzip fix for a more permanent solution).
I believe that anyone who cares enough about playing with Metal and Stars, will be able to figure out how to make it work. (And those who don't just won't even notice that it's gone).
EDIT: It's been booted as of v1.0.33