It is "Selected Output Profile", which is ProPhoto. Nothing changes when I change the prrofing profile.
I assume you mean "Selected Recipe," and unless of your chosen output recipe colorspace is some weird proof space, that shouldn't cause a huge brightness issue, so I don't know, sorry.
Your C1 screen looks different than mine -- are you on Windows? Specifically, you have a little "star" icon to the left of the arrow which I have no idea what it is, and I see the start of a line where the rgb numbers should be if you're cursor is on the image...