Sorry - I didn't read your post properly!! Did you have any trouble with any of the fixes? Did you have any trouble finding the preferences folder? Once you deleted that, did you have to go through LW's setup wizard all over again?

Go to your gnutella.net file, hover your mouse over it...how big is the file?

If you post your system details, we have a chance of helping you more. The help thread has info about all the details that we need.