Windows Vista - Lime Wire 5.3.6 – Wi-Fi from a cable

I do not know how to resolve this issue but it is getting annoying. I bought the life time LimeWire pro deal about three months ago. And recently I have been getting messages to update my LimeWire, however when I go to upgrade it asks for my email and none of the three emails I have seem to work. I don’t know if I put it in wrong when I signed up, or if there is a database error of some kind but I can’t do anything with my LimeWire now as far as upgrading it.