@kriaase - I suspect there is something setup incorrectly on aspiro.com. When I downloaded the air file on my Mac (os 10.8.3) I received the same error that you did. I copied it to a USB drive and then tried the same file on my Windows machine. Again, the same error. Next I downloaded the file from the server on Windows. This time the .air file ran without any problems. I copied this file over to USB and tried on the Mac. Presto, the installer worked as expected. Hope this helps.
Chris
