Yes you can make the files open in a new window. Look in the file “helper.php” around line 246 and line 193.
Change
$html .= '<a href="'.JURI::base().$folder.'/'.$rows[$i]['name'].'.'.$rows[$i]['ext'].'">';
to
$html .= '<a target="_blank" href="'.JURI::base().$folder.'/'.$rows[$i]['name'].'.'.$rows[$i]['ext'].'">';
Look for anything with “href” in the text. This tells you it’s a link. Then just add the “target=”_blank”
Hope this helps!