Here's the SHA-256 checksum I get for the PC version (Mediafire):
1d49e9e7a4c21c677ba76e71aa435723e9cc94df6b8ca2555073fa8f059417ec
I downloaded this just now and it works. If you get a different checksum, there's a problem with your browser. If you get the same, there's a problem with your archive program.