I added all my songs that were in limewire to my playlist i.e by dragging them all down. After restarting limewire they had all gone from my shared folder and from my computer? That meant to happen? I have lost all my music.

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) Also do it on the specific media type folders & also the Shared folder.

I hope you didn't press the Delete button in the library window. If yes, then they're definitely gone!

Playlists & how to create them (click on link)

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