Changing Default Server
Find the file called scripts_config.xml it should be in the res folder.
And Add a line per Host you want to connect to.
<host addr="login.worldofwarships.ru:20020" alias="WoWS RU"/>
On my Mac it was located here ...
./Library/Application Support/World of Warships/Bottles/worldofwarships/drive_c/Games/World_of_Warships/res/scripts_config.xml