Could you please help me to find the right term for a starting (home, main) window or screen of the programme, i.e. when one launches a program on a PC or Mac and starts it, a ... window (or screen opens)? Thank you.
P.S. Below is the sample of the window. It is the main window where users do the most of the work. Often it has an application menu (file, view, edit, about, etc). Here a user can click on "file" for example and open this menu item.