To create a shortcut on the toolbar, just drag it to the True Launch Bar toolbar. The regular Drag&Drop rules are applicable:
Holding the SHIFT key pressed while dragging a file/folder – TLB will move the file/folder to the toolbar. The original file/folder will be deleted.
Holding the CTRL key pressed while dragging a file/folder – TLB will copy the file/folder to the toolbar. The original file/folder will be preserved.
Holding the ALT key pressed while dragging a file/folder – TLB will create a shortcut to the original file. The original file/folder will be preserved.
You can also drag files/folders by holding down the right mouse button. When you release the mouse button, TLB will let you choose what is to be done next: