Unfortunately I just bought FF7 but wrong platform!

Had trial version of FF7 and thought it was so good that I wanted to buy it. I have only a Mac computer and of course the Mac trial version worked beautifully before. In my hurry I didn't read that the version I bought was Windows platform!

Now of course the license key doesn't work.

Have I now wasted all my money, or is there a way to still make it work on my Mac? Any suggestions would be welcomed, even if it is a hack as I'm feeling pretty gutted at the mo.

Thanks in advance.