Trouble downloading Self snapshots

[Phil Thompson]

Hi there a college mentioned Self to me when we were having a chat 
about pure OO languages so I thought I'd give it a go.

I've downloaded the Cygwin version and managed to get the VM# prompt 
but can't download either of the snapshots.

The file sizes are:

Demo.snap.gz 12.9MB
Empty.snap.gz 15.8MB

When I try to extract them I get gzip incomplete or corrupted from 
PowerArchiver. I've tried using cygwin gzip but get a message saying 
it's not a gzip file.

Anyone got any ideas?

Thanks,
Phil