That's ok. After you delete the preferences folder a new one will be created! If you have to go through all that setup stuff again, it means that you deleted the folder properly
Try closing LW & restarting your computer. then start LW & see if it connects.

If not, go back to the thread I first linked to in post #2 & try replacing the gnutella.net file.

Read the thread carefully & follow the instructions there (there are screenshots to help).

Deleting the preferences folder has fixed this problem for a lot of people, but replcing the gnutella.net file has worked for others. Just give it a try.