Update line 68 from:
$UpdateQuery->bindColumn("user_pass", "s", "".((isset($_POST["user_pass"]))?WA_SHA1Encryption($_POST["user_pass"]):"") ."", "WA_IGNORE");
to:
$UpdateQuery->bindColumn("user_pass", "s", "".((!empty($_POST["user_pass"]))?WA_SHA1Encryption($_POST["user_pass"]):"") ."", "WA_IGNORE");