Aera 760 update

Changes made from version v2.30 to v2.40:
Add support for FIS-B Center Weather Advisories and Graphical AIRMETs
Improve PDF viewer loading times
Improve En Route Chart Wi-Fi download process
Improve battery charging status messages and information
Resolve NMEA communication issues
Resolve issue starting mass storage mode
General improvements to system operation
Includes GDL 5X software version 2.14
Includes GDL 39 software version 4.91
Includes GPS software version 3.30

https://www8.garmin.com/support/download_details.jsp?id=15213