See if you find any help here: http://www.gnutellaforums.com/genera...-osx-help.html
See, if you looked through the Stickys at the top of the forum sections, you'd find your answers waiting for you.

To find your downloads: go to your LW Library window, select Saved Files folder & press the Explore button. Sample image here: Using Library Explore button to access downld folder (click on link) & the folder will open up for you.