https://opencpn.org/OpenCPN/info/downloadopencpn.html ( mac / pc / android versions )
PANAMA POSSE PARTICIPANTS CAN GET THESE CHARTS FOR FREE PLEASE FOLLOW THIS LINK >>

place them into their own directory – create a directory (folder) with a unique name
example (c:\charts\sat_charts ) on a Mac Documents Charts
launch / open OpenCpn
and add the charts –
click on Options ( little wrench) -> Charts -> Add Directory -> Select the Folder you just created -> example (PC c:\charts\sat_charts or MAC Documents/Charts/Stelllite-Charts)
Click [x] Scan Charts and update Database – Apply – wait and voila !