You get 6 months of updates after purchase. So if 6 mths has passed since you bought it then it's too late but otherwise yes. Many people bookmark their personal pro downld page. Next perhaps you should.

Check your original email from customer support or else
http://www.limewire.com/english/cont...pro_lookup.jsp
No need to uninstall LW. The installer will uninstall it at the very beginning of the installation process.
When you go to the LW Library window, select the incomplete folder, then select all the files whilst holding down the SHIFT key so they're all selected, then press the Resume button. That will force them back into the download window.