This is not a problem with our (the customers) ISPs or with the file itself.  It's a problem with Renderosity's server cutting off the connection before the file is finished downloading, probably because it goes over an arbitrary size limit (likely 75mb as the file is 77mb.)  

If you can't get the file, message Powerage directly here on the site, he has set up an alternative download for the file and can send you a link.  When I messaged him he responded to me very quickly despite the holiday -- clearly he is all about great customer service instead of snippy dismissals to paying customers.  Thank you, Powerage, for giving us a workaround to Rendo's problem with delivering this item.