Starsector 0.97a is out! (02/02/24); New blog post: Simulator Enhancements (03/13/24)
The game was completed 8 years ago and we get a free expansion every year.
Arranging holidays in an embrace with the Starsector is priceless.
I'm not sure why, but its visual design with the transparent pop-up and the dark overlay over the background strongly suggest that should be possible.
Btw - you can actually right-click outside to dismiss it. This is true with most dialogs in the game.