I noticed that a button of its own has not been displayed for a long time.
At first I thought that I had forgotten it when I transferred it to the new computer.
Now I've checked and found that the code:
Code:
 "cmd: "Machine.Advanced.Start_From_Selected_Line" image="ownicons/SL.svg" imagechange="True"
is present in the file. But the button is not shown in the GUI.

It works on the old computer with an older TNG v2 version.