Previous versions of Adobe Captivate (8) for Mac

Hi,

I have a licence for Adobe Captivate 8 (for Mac) which was bought more than a year ago but since then I had to erase my computer so I don't have the .dmg file anymore. It's not available under my account as my sister bought it for me. The only thing I have is the licence key. Is there a place where I can download the dmg file.

Thanks,

Argi