that's not LimeWire--that's an OS X file.

Whenever you set options for a folder (list view, size, postion on a screen, etc), the OS X Finder stores the setting in an invisible ds.store file for that folder. OS 9 used to store all that kind of info in one file--OS X stores each folder's settings within that folder.

You can erase them--OS X will just create new ones when you open and change that folder again.