What bblue is expecting is that Reaper should open but not create a new project or open a project until he tells it to. Basically, no arrange window or mixer or anything should even be created unless there is currently an open project. You would basically have a big grey window on screen with nothing inside of it, other than the menus at the top of the window so you could go "File>New" or "File>Open". This is how a lot of other software works, it doesn't create a new session or project or picture or whatever it is until you tell it to, it just opens idle doing nothing until you tell it to either open an existing project or create a new project.