Service Pack 2 updates WordPerfect X6 (version 16.0.0.388) to version 16.0.0.427.
For most users, the update is automatic. It’s also available here:
http://www.corel.com/corel/pages/index.jsp?pgid=800161&ppid=5000001
And release notes are here:
http://www.corel.com/corel/pages/index.jsp?ppid=5000001&prnid=5500001&pgid=800161
Service Pack 2 is compatible with Graphcat Photo Catalog Builder for WordPerfect X6.