In Sources/Subs.php, find this line:
$data = strtr($data, array('<br>' => ''));
and replace it with this line:
$data = strtr($data, array('<br>' => '', 'www.dropbox.com/' => 'dl.dropboxusercontent.com/'));
You must do this twice!
Now using images from your DropBox account is easier than ever! You don't need to change the share link at all in order to show the image!