Update OpenCPN to 5.0.0. Changes since 4.8.8:
As a successor to OpenCPN Version 4.8, OpenCPN Version 5.0 contains many
new features and enhanced functions.
Among them are:

..Redesigned user interface, incorporating modern user interface elements and
  concepts.
..Support for multiple chart views simultaneously, using different charts
  display options if desired.
..User defined templates for easy recall of multiple configurations.
..Support for the widely available MBTiles chart format.
..Extended options for route and Waypoint creation.
..Expanded display of vector chart (ENC) information, including embedded
  images.
..Measurably improved performance and reliability over all supported platforms.

(bouyer)