I did get it to work, just to clarify if someone else wants to make this mod.
proper line of code is no spaces.
shuffle($Rich_Web_Slider_Images);
Also place the code in the file:
public_html/wp-content/plugins/slider-images/Rich-Web-Slider-Widget.php
The line of code should be added after
$Rich_Web_Slider_Images=$wpdb->get_results($wpdb->prepare(“SELECT * FROM $table_name1 WHERE Sl_Number = %s order by id”, $Rich_Web_Slider));
shuffle($Rich_Web_Slider_Images);
Thank You for quick response, very much appreciated, works like a charm.