paolini With LW 4.10.x & later, LW now has a preferences folder in a new location. It might be worth trying to delete it also whilst LW is CLOSED!
Use your search function, go to options & change view mode to show "hidden" files & folders. Then search for limewire
It's found here: C:\Documents and Settings\username\Application Data\LimeWire
The Application Data folder is "hidden".
You can see an example of how to find & delete it from a FrostWire example here: How to delete your FrostWire Preferences folder
But of course, it's the limewire folder you search & delete. Check that the one you select is from the above location (ie: within the Application Data folder!!!) And of course only do it whilst LW is "closed"!

If this doesn't fix it, well I don't know. You could try other ports. Here's a list of several to try: 1111, 3500, 4008, 1203, 10000, 15189, 80, 88, 8080, 8000, 20282, 22817, 443, 427, 34599, 40475, 64049, 20-21, 3689, 631, 139, 548, 19515, 22091, 25079.

ie: Go to LW's menu bar, Tools>Options>Advanced>Firewalls. Change the listeing port to one of the above. Also set your port to manual port forward & change the port to the same. There's a lot of ports there but if you're determined to get LW running, then it's worth the persistence. Don't forget to press apply after making any changes. Then go to LW's menu bar, File>Disconnect, wait a minute, then File>Connect. Give each no. at least 20+ mins to try to connect.

Failing this, you could try proxy options. There's different types. A Fix for those whose ISP's block Limewire pages 1 - 3 which have links to alternative instructions.