The Polar Diagram Manager can be opened in several ways. There is a menu item in the File menu named Polar Diagram Manager… You can also open the manager in each of the performance menus in the vessel settings editor.
There are several areas of this editor which are important.
The control at the top allows you to switch between multiple screens within the editor.
This screen has several controls.
there is a menu at the bottom right of the lister, which allows you to view the polars for sailboats or motorboats (or the motor component of a sailboat.)
import a polar diagram file using the menu available on the + button at the bottom left.
select any polar by clicking on its row.
create a copy of the selected polar, using the menu available on the + button at the bottom left.
delete the selected polar by clicking on the - button at bottom left.
rename a polar.
see which vessels refer to each polar.
edit a polar diagram by clicking on the reveal button at the right, on the polars row. This is described in more detail in the sailing or motoring section.
When a polar is selected, the diagram on the right will display its characteristics.
This screen shows a catalog of sample polar diagram files. This is described in more detail here.
Briefly, if you want to use one of the samples as the basis of your vessels performance, you select the sample and then import it. Once the catalog sample has been imported it can be further edited to more closely match your vessel.
There is some built in help for this editor, available through the Help screen.
LuckGrib Weather Routing is currently only available on macOS. Support for iOS and iPadOS is under development.