It seems like nv is still using the
concept of selling Paper charts and electronic charts as a bundle. I agree that their web site is not very clear and user friendly.
Follow this link
https://eu.nvcharts.com/index.php?page=content&coID=43 and choose "2016" and "Caribbean" to take you to the three choices for Bahamas.
Selecting any of these leads to a download link.
To use the charts with OpenCPN you will need to download the nv-plugin and get a code key to decrypt the charts. Notice the
phone number to nv.
Yes I have these charts installed on OpenCPN, but I got mine through
Fugawi, an option that no longer exists.
I think it's a fairly safe bet that Explorer charts will once again become available for OpenCPN, but most likely not before the next cruising season (end of 2019). Not that it helps you now....
Good Luck!
Thomas