• SD-49319, 53651 : Additional Email Signature gets added while selecting reply template for request reply has been fixed.
• SD-53435 : Upon replying a Request created into servicedesk without any CC emailid, CC field is populated as 'Not Provided', has been fixed.
• SD-53778 : Performance memory leak identified while performing continuous Servlet / REST API calls on the server has been fixed.

Please refer to the below link for the steps to install the patch. 

http://www.manageengine.com/products/service-desk/service-packs.html#sp

Regards,
Vasanth
ServiceDesk Plus Team