Is this software available for a UNIX platform?
No, the software is not available for a UNIX platform. At the time of release, the only supported platform was Windows and it was kept this way. Nowadays, the program appears to be available, but for the same platform.. I've checked the official website and all the possible links, but the software still supports Windows platform only.
You can get an official response using the following link: http://www.windspireenergy.com/wind-turbine-support/contact-windspire.htm