RTL not working on sub menu

Hey,
Im testing the plugin before i purchase the pro version but i cant get the RTL to work properly.
i have installed the css found at: https://www.megamenu.com/documentation/rtl-support/
but the sub menus are still aligned left. i have tried all the settings but none seem to make any difference.

The page I need help with: [log in to see the link]