LW Pro has never has an unexpiring support. Up until about 2 years ago they only offered 6 months support. Since then they've also offered an extended 12 months or one off options. Never told you? It has always been listed on the Pro page that support is for a limited time.
emails sent to you would have offered you to continue support at a discounted rate. If you chose/choose not to continue, that was/is your choice. Examples of email & personal pro page images:
http://www.gnutellaforums.com/window...tml#post320755 (see attachments to see typical email they send)