A test file is automatically downloaded every 15 minutes from the EU server, and the download time is logged. Some hours ago the download time was larger than normal, probably due to high server load, while now it seems OK. So, you may just try again now.
A general suggestion when downloading large files: right-click the download link and select "save target as..." (or "save object as...", or something like that, depending on your browser). This will copy the file to your computer without passing through the browser, which makes the process more robust. I've just downloaded this way the file you mentioned, without any problems.