Hmmm... I just got the file by using Total Commander's integrated FTP client.
So, there is something with settings, as Malzilla and Firefox does not get it, but normal FTP clients does.
There is one basic difference between a ordinary FTP client and Malzilla.
FTP client logs in on the servers, and does not log out until you say so.
Malzilla logs in and out for every click on GET button.
I'll take a look now at connection parameters, to see if it has something to do with PASSIVE settings.
Some servers needs that mode for transferring binary files.