More than a few months ago, LW only offered Pro support & updates for 6 months period. Now they offer it for an optional 6 or 12 months. If you purchased LW pro more than 6 months ago then your email address will have been auto-removed from their database systems long ago.

You can either purchase LW pro again, else get LW Basic for FREE at Lime Wire » Download LimeWire.

(If you don't wish to contribute toward LW's future development, then get Basic.)