Is it
this game?
I think it was only released on Macintosch and not on PC... and it seems that it was (is?) shareware. The company that made it (RoundHouse software) has got a site, but it's down. They have an old snail mail adres, though.
You could mail of write them to ask? It would imho be save to assume it's ABW, but as far as I know, Abandonia is PC-oriented...