Dear Terry, As mentioned previuosly I installed the latest version of "open CPN"and then went into "charts" and added the full compliment of my old CM93 charts. (Inserted the location on my hard drive) They do not display when I boot the program. I have ticked the two boxes inupdate control but they still do not load. These charts have always displayed in the old version on my old Win 8.1 laptop
. I am now running Win 10 on a new ASUS.