Read our previous post please:

Currently the extension doesn't support images which are defined in Joomla! menu item settings.

Regards,
ARI Soft

Is that custom css which I can post in the ari menu settings panel?

The following code can be used in "CSS Styles" parameter in module settings:

#{$id} LI.ux-menu-itemMENUITEMID>A
{
background-image: url(LINK_TO_IMAGE);
background-repeat: no-repeat;
background-position: center left;
}

Where MENUITEMID is ID of menu item and LINK_TO_IMAGE is a link to an image. For example if you want to add <joomla_directory>/images/menu1.jpg image for menu item with ID = 54, use the following code:

#{$id} LI.ux-menu-item54>A
{
background-image: url(images/menu1.jpg);
background-repeat: no-repeat;
background-position: center left;
}

PS: Path to an image can be another if SEF is enabled.

Regards,
ARI Soft

Thanks. css was never my strong point. I expect to finish it today.