Hi,
You can login FTP and go to yolo-shortcode.js file (wp-content/plugins/yolo-finanzen-framework/assets/js/yolo-shortcode.js), later you find to the function "owlCarousel" and replace the content of "default" variable by these lines:
var defaults = {
// Most important owl features
item: item ? parseInt(item) : 3,
rtl: rtl ? rtl : false,
autoplay: 'false' == autoplay ? false : true,
autoplayHoverPause: true,
margin: margin ? parseInt(margin): 0,
slide_duration: duration ? parseInt(duration) : 1000,
loop: 'false' == loop ? false : true,
nav: 'false' == nav ? false : true,
dots: 'false' == pagination ? false : true,
navText: ["<i class='fa fa-chevron-left'></i>","<i class='fa fa-chevron-right'></i>"],
slideBy: 1
};
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Thanks.