Show menu, impossible?

Hello everyone
Small worries with Kdenlive, the file menu bar, Edition ETC has disappeared. In the notice it is mentioned of CTRL+M or else I quote

In order to optimize screen space you can turn off the menu bar in Settings ‣ Show Menubar or by hitting Ctrl+M. This will add a hamburger menu (application-menu) to the main toolbar containing the menus.

Ctrl+M does nothing and I don’t have the the hamburger menu.

what can I do ? A big thank-you

I am rather zero in English, I use a translator who, I hope, do his job well.

I found an approach thanks to another forum by doing a search on Hamburger menu

If it can help