Ya know, its been doing the same thing to me, when I try to use the setup. Running it as an Admin only results in a file not found message. I use Vista x86..
Ugh. Second time downloading it.. and fileplanet isn't being very cooperative, either. I don't think it ever finished the download- rather, it just, about 80% of the way through, shunted me out, and stuck me back into the line.