Hi Gary,
Please e-mail your address and request in to insidesales@maptech.com and we can send the upgrade to you. There will no be future revisions to the SeaRay Navigator software. The SeaRay Navigation systems will be manufactured and sold by a different company in the future and though the software that runs on the new system will be very similar, it will not be compatible with the existing line of Navigators.
-Justine Baldwin
Technical Support Specialist