<snip>... i´ve got a white MacBook with macOS Sierra, and it behaves very "windowesque" in all things related to "security". It won´t let me download or install certain files or apps without a system warning or without tweaking the security prefs.
Why on earth are you using Sierra, especially on that poor white MacBook? It doesn't deserve that kind of torture.
Downgrade and you'll be much happier. (I'm getting all my serious daily work done on late 2010 MacBook Pro / Snow Leopard combo and it will stay that way as long as possible.)
Try download from here: https://we.tl/t-nwn8LhxV14
Thanks, this time d/l worked as expected. All 3 files are there.
I suspect the forum server might be doing something to the uploaded files/archives. Maybe even deleting .exe files, so others, who might want to download attachemnts to previous posts, beware!