I've just downloaded it and it's fine. Yes it's only 5GB, but the .zip isn't corrupted any more.
EDIT: I haven't actually installed it, by 'fine' I just mean I can extract the .zip.
They sent an e-mail back to me saying that the developer of necrovision sorted the file out and said it can now be installed fine. I am downloading now, and will check later to see if it installs ok.
anyone got an idea for what the bonus game is/ what the goal is to get it?
I have no idea what the bonus will be, but i guess the next bonus would unlock with 10,000 bundles sold.
installed fine for me now.