Bad luck ... you are not the first to have done this and I got a hell of a hard time off the forum whaen I posted a post like yours
Go to preferences or options > sharing and you will have to browse for and enter each folder you were sharing. Don't forget to press apply OK afterwards. I Do hope this works for you and you have not lost your files, if you did what you have said, I don't think you will have a problem... Let us know how you get on
You can also do this in Limewire Library, but I prefer the first option.
My main dislike of the Library way is this. WARNING.... Do not use the delete button on any file in the Library, unless you never EVER want to see it again. It will be deleted immediately from your hard drive. This is something you will not want happening, I think