Sounds like you accidentally downloaded the full program. They sort of hide it on their website, but there's a completely free version hidden in there. Trust me, it exists.
I thought the linky I posted above led to the free version, but I'll double-check and get back to you.
In the meantime, take pity on a sad lemur. I've completely hosed my WinXP box by doing things to it that I really shouldn't have done. Not only am I a sad lemur, I'm a bad lemur. Never never never install Fedora Linux on an XP machine and then delete the partition. Bad lemur! No dessert for you!
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