Hi TemabgLtd,
you have to edit on plugin as well as on themes.
You can edit following lines
plugins\etdashboard\inc\slider\widget-slider-normal.php: line no 300
have you already changed here evisioncorporatepro\inc\sidebar-widget\slider-normal.php: 63 and 130
first edit this one. then if this doesn’t help you then you can move to the plugin area
Regards