I am sorry to report that I found an error. I messed up the encoding on the includes/classes/order.php file.
To fix this you can download the pack again, and upload that file or edit that file yourself
Manual fix, you need to open that file, change the encoding to UTF-8.
Then go to line 922 and
Make sure this line reads as
Because of the wrong encoding, the 様 got all messed up.
$this->customer['lastname'] . ' ' . $this->customer['firstname'] . '様' . "\n\n" .
Sorry for this,