If so it seems this falls under the title "Abandonware" in my book.
Abandonware has no basis in law. It's stealing, like if you see anyone elses processions not being used (like for instance a car or a house) and decide to take it.
The question here then is if the readme file included in the archive constitutes such a license, and if not, what license did "Aminet internet archives" (whatever organization or person that means) agree to? They should have had a lawyer write this thing.
If it doesn't constitute a license then every single distribution of it was illegal.
I beg to differ, at least by any common definition of freeware. The software was distributed free of charge. Freeware. That's not to say that this makes any difference legally when it comes to copyright.
Freeware is just slang for distributing for $0.00, companies are allowed to vary the price at any time. The shop that gave you a free sample yesterday, doesn't have to give you a free sample today.