F9 pilot recruitment says that the “application window” opens Feb. 3rd.

I'm confused, I didn’t know that there was a window.

Is this like Southwest where you fill out 3 apps in 3 different places? I thought that F9 just did airline apps and that’s all. Do they want you to update airline apps once window is open to show that you’re still interested, or is there another application?

Can someone please explain what the application process is, including the “window”?