You need to be very, very careful about deleting items from the Library window!!! If you wish to stop sharing a particular folder, you go to Tools-Options & Sharing & click on the folder you wish removed & press the Remove button. Then press Apply & OK buttons. Deleting items from the Library window actually deletes them from your computer.

OK, it looks as though you also shared your LW Dwnld folder. And since you deleted it, it will no longer show in the LW Library window.

Go to Tools-Options-Saving & Browse for your LW Dwnld folder. If not found, then you'll need to create a new one. Then go to Options-Sharing & add this same folder & any others you wish to share to the share folders list. Press Apply & OK buttons.
You could try searching your comp for any files/folders you think might have been deleted. If you can't locate them & then probably the only way to get them back would be to use a disk utility that can retrieve deleted files. You'd need to do it fairly quickly though, because otherwise if you continue to save files they will overwrite the imprint of the deleted files. A hard lesson to learn.