TheThe Image Slider – Slide options for slide url

Would like to add the option on slide urls to open in new window or not. Can do one or the other across the board but would like the option for each slider link.

This is where I set option one way or the other: thethe-image-slider/thethe-image-slider.php

$output .= $url ? '<a class="slide-link" href="http://'.$url.'" title="'.$slide['title'].'">&nbsp;</a>' : '';

change to:
$output .= $url ? '<a class="slide-link" target="_blank" href="http://'.$url.'" title="'.$slide['title'].'">&nbsp;</a>' : '';

Thanks!