To update your installation, simply start the program and it will automatically find any available update. Alternatively use the "Update program" facility in the program Help menu. Note you need to have unlocked AND registered your program to receive updates.
Summary of improvements
The main change in this update is in the publishing of websites and web documents. Publishing previously relied on a subsystem within Windows, which apparently no longer works reliably on some Windows systems that have been updated to use Internet Explorer 11, making publishing unreliable. Therefore with this update publishing is no longer dependent on this Windows subsystem and so it should be reliable again on all Windows systems.
The update also includes several other minor bug-fixes and improvements.