This is a maintenance release for the 6.2 series of WHMCS that includes bug fixes and improvements.
Both a full release and incremental patch set upgrade are being made available. If you are running the immediate previous release 6.2.1, you can use the incremental patch set to upgrade.
Posted by Matt on Tuesday, February 2nd, 2016
Read more @ http://blog.whmcs.com/?t=111086