You'll have to search you pc to find where your files are. From your desktop go to Start>Search>All files and folders, then type the name of a file you know you had and you should be able to find your files that way.

You'll need to know the location of your saved/shared folder so you can add it back to LW and also add them to Nero.

If you can't find them, is it possible that you deleted them by accident? If you delete files from inside LW they don't go to the recycle bin, they are deleted from your hdd.

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If it ain't broke, fix it till it is!