I had to trade in my old laptop and now I cannot figure out how to get Limewire put back on my new one. I really do not want to have to pay another 53.00 Does anyone know how I can download it again without having to pay.

Hmm... $53.00 Bucks??? I think you may have been Scammed. LW has Never been said price.
Probably should get an Authentic Version of Pro here.
Lime Wire » Official Website & Free Download, BitTorrent «.

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I Don't Suffer From Insanity, I Enjoy Every Minute of it

I've had to install a new harddrive and subsequently am reinstalling LW. I was smart enough to print off the receipt when I originally purchased LW Pro. I still have the 'reference number' and am wondering how I can reactivate my Pro version. Any suggestions?

If you still have your pro installer you can use that. Pro support, as mentioned many times on forums, lasts for 6 months only, only since September last year did they offer an alternative 12 month pro support & free updates. During last 30 days of support, they email you warning you of pending end of support & offer a discount to continue support. If your support has finished then you need to re-purchase Pro, else, get LW Basic. To check if still support, go to LW site, click on Support page, you will see a link for Pro users. Type in the email your originally purchased pro with.