Thank you for your prompt response. I need some clarification as to what exactly you mean by your instructions.
To delete a line I either go the the delete icon on the left side or choose delete from the drop down menu and the result is the same. I then select the line either using a window or by simply pointing to it and the line becomes dotted. This indicates to me that it has been selected and then I hit the enter button but nothing happens. With the previous versions the line then disappears and is deleted.