I don’t have my OS set to English, so I’ll try to translate as accurately as possible: Right click on the menu button and select “configure” (not “edit”). You should get a window with two tabs “panel” and “menu”. In the tab “menu” you can then turn off the option “show bookmarks and locations”. This should do the trick.
Is it the white unibody MacBook? I have installed LMDE on it and am absolutely satisfied with it so far. Thinking about selling my 2016 Intel MacBook Pro now!