WP Mobile Menu

Hello,
I installed “WP Mobile Menu” because I want to fix menu on mobile. I want drop down menu on mobile as well as on the desktop. When I installed plugin the only thing that changed is I can set menu on the left or right side, but there is still no drop-down menu. It is still navigate menu with options to choose every page separately. Can you tell me how to set up the drop-down menu for mobile? Thank you in advance!