Sorry but that's all I know.. try your question on the opencpn section of this forum.
Remember chart works is a stand alone program, does not work together with opencpn. It only creates a gpx file, akin to a route. Then you
import this to opencpn via gpx in-out.
On opencpn in the toolbar select route manager the window that pops up in the bottom left should be
import -- export all these are the gpx in/out function.
Hope this helps.....
good luck!