Hi Agatha
OK, you need to update the ArileWP Pro theme package because you are using the older version of the theme.
So follow the below steps:-
1) First, download the ArileWP Pro theme latest version from the http://themearile.com/login/ account.
2) After Go to WP-dashboard and activate another theme instead of the ArileWP Pro theme.
3) After Delete the ArileWP Pro theme.
4) And please install the new theme package of the ArileWP Pro theme.
Let me know if it works.
Thanks