Create a folder, put the files you want to share inside, then go to LW's menu bar, Tools>Options>Sharing & press the Add button, then direct it to where this new folder is & select it. Then press Apply button. You can also do this by going to the LW Library window, menu bar, File>Add folder to share.

See these example images: 1. Adding Folders to share via Tools>Opions>Sharing, & also 2. Adding folders to share from LW Library