Linda has been probably been dropping 'Elements' from the name for so long that she thinks that she actually is using the full version.

But to answer your question:

Highlight duplicate, press delete; highlight duplicate, right-click then select delete; use the 'delete' from the dropdown menu; hit the delete button on the taskbar, or just press F1 and use the function, it will answer all your questions if it is beneath you to go to the lowly Elements forum.