I simply went to the NOAA site and downloaded charts for free. Nautical Charts & Pubs
They have to be unzipped but that's not a real problem. If you have a problem download a free copy of WINZIP.
My problem was getting the software to find the files. I had to move them to the Charts folder that Seaclear creates. I need to find a way to make it look elsewhere for the charts because I want to keep them on a USB memory stick.
But I tried OpenCPN first and it was just to difficult to use.