Which OS are you using?
Did you make sure to show hidden files & folders first, before trying to replace the gnutella.net file or delete your preferences folder? If you haven't shown hidden files & folders, you won't be able to see Application Data or the LimeWire (preferences) folder within that. There are instructions about how to show hidden files & folders within the link in my post #7
I tried to make that info as easy to follow as possible...just go through the steps again slowly. If you've used really old versions of LW in the past, remember to look for a preferences folder in the old location (in case you have 2 preferences folders).
If you're still stuck, please post back with your system details...
http://www.gnutellaforums.com/connec...tml#post298705 has all the info about what details we need.