KAP File Utility
This is a GUI front-end interface for mc2bsbh written by Gunther Pilz.
It requires GraphicsMakick, but will install it for you.
(Being nice, it asks your permission.)
Or you can download the 0.9 (alpha) version from this site here.
This downloads a self extracting package. You might want to create a folder for it since it defaults to downloading to the same directory.
Or you can find it in the downloads section of the German language OpenCPN site.
For support, post in the OpenCPN Forum on Cruisers Forums