Software download

I am trying to download software from CurationSoft that uses Adobe Air. Here is the error message I get back:

Adobe Reader could not open 'CurationSoft (3).air' because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly decoded).

I am using a MAC. Any ideas on what could be causing this and how to fix it?

Thanks.