User blog comment:Dragonjet/API Links: October 2015/@comment-27060698-20151011025444/@comment-26154973-20151011031806

Is KanColleViewer.exe.config in its initial unedited state? Maybe you need to re-extract it from the release zip. Otherwise it should work like that, you press the button, KCV uses http://www.dmm.com/netgame/social/-/gadgets/=/app_id=854854/ as the game link (this is by default for latest versions), if DMM want to re-login you, then cookies should still work for all redirects until it takes you back to http://www.dmm.com/netgame/social/-/gadgets/=/app_id=854854/ (from which you will be playing, also, it usually don't require DMM re-login when you refresh or close and re-open KCV).