It doesn't matter whether 'Keep in Dock' is checked or not. When the Quicken icon appears in the dock, it's not the application's Windows icon but instead, a rectangle with a blue bar on the top with a white field (what I would call a "generic" windows application icon. A screenshot is attached. I've also attached a capture of the icon displayed in Windows.
Looking further, the Windows application, buried down in Program Files, is qw.exe and, in Windows, it has a generic application icon, which is what I'm seeing in the dock. The shortcuts that are displayed in the start menus, quick launch toolbar, on the desktop, etc., have a more distinctive icon (like most applications). See the second attachment.
Thanks.