Umm...Sharkie what 2nd edition are you refering to? I hope you got LW pro thru the official LW site:
http://www.limewire.com/english/content/home.shtml
You can get a CD edition. But as far as I know that's all.
lizziebrad I'm sorry LW customer support didn't get to your problem before the weekend but they will I assure you. And yes if you don't eventually get the registration to come thru then you should get your money back. You should at least get an extension on your registration for the period you haven't been able to downld the softw. Sorry to hear there's been this type of issue. About a month back they had a problem for a day or two with their online registration which may have cropped up again.
Keep an eye out, just make sure their mail doesn't end up in your junkmail.