Vice64 addon: how to load a floppy image

Hi,

I recently installed Vice64 but I just cannot find a way to load a floppy image.

I installed the Linux version on my desktop PC and found out that the keyboard shortcut is something like Alt-A, Alt-1 to Alt-8. But neither of them work on LibreElec.

On Libreelec I attached a basic USB gamepad and can now open and navigate the main menu (Select-X) and close the emulator (Select-Start) using this controller. I also can control this using a standard usb keyboard. But I just cannot find a way to access the file-open menu.

thank you very much

JPT