Hi Advent,
Because you bought Pro more than 6 months ago (your subscription's out of date), your email address won't be in the database anymore.

If you want Pro, you'll have to buy it again.
LimeWire: The Official Site for the Fastest File Sharing Program on the Planet
The Pro payment entitles you to free upgrades & email support for up to 6 months. It's the user's responsibility to save & back up their Pro installers