-        public $version = '6.3.6';
     +        public $version = '6.3.6.2';

Why would you break the version standard? Maybe there are scripts expecting a specific format or some such. Also, given the majority of this change, I think 6.4.0 or even 7.0.0 is more in order, but at least 6.3.7.

Edit: To make matters worse, elsewhere in the code, it's referenced as 6.3.8. Very confusing.