I think the old problem was the screen gamma changing when the NS 450 was opened, the new problem which OP (and myself!) are having happens when it is closed.
I've attached my options.lua
options.lua
Having the same issue, getting a 502 "no saved authorization found" when I launch the game.
Checked my dcs.world profile and my steam account isn't bound to it, and I'm pretty sure I've not bound it to another account.