The slider controller text is set using the following Javascript

(function ($) {
    $(document).ready(function () {
        $(document).bind('ready ajaxComplete', function () {
            //Replace the controller numbers with text
            $(".et-pb-controllers a").html(function () {
                return $(this).html().replace('1', 'Home').replace('2', 'Deals').replace('3', 'Store').replace('4', 'Support').replace('5', 'Settings');
            });
        });
    });
})(jQuery);

To change the text on your slider, change the words 'Home', 'Deals' etc. to the text you want the slide controls to display.

If you have less slides, simply remove a replace action, so for example, if you had 4 slides your JS would become this:

(function ($) {
    $(document).ready(function () {
        $(document).bind('ready ajaxComplete', function () {
            //Replace the controller numbers with text
            $(".et-pb-controllers a").html(function () {
                return $(this).html().replace('1', 'Home').replace('2', 'Deals').replace('3', 'Store').replace('4', 'Support');
            });
        });
    });
})(jQuery);

And if you have more slides, simply add a new replace action, so for example, if you had 6 slides your JS would become this:

(function ($) {
    $(document).ready(function () {
        $(document).bind('ready ajaxComplete', function () {
            //Replace the controller numbers with text
            $(".et-pb-controllers a").html(function () {
                return $(this).html().replace('1', 'Home').replace('2', 'Deals').replace('3', 'Store').replace('4', 'Support').replace('5', 'Settings').replace('6', 'New slide title');
            });
        });
    });
})(jQuery);