.elfinder-navbar-root[title*="@aws"] .elfinder-navbar-icon{
    background-image: url('https://theoddsfactory.com/wp-content/plugins/wp-file-manager-aws-s3/images/aws.png') !important;
}

.elfinder-navbar-root[title*="@aws"] .elfinder-navbar-icon:before{
    content: '' !important;
}