Have clicked on the D.A.R.T. fire control computer to set up the radars, however the clicking to exit the box does nothing.

However weirdly I have been able to move the box to the side and am able to reopen another config window which I can close with the close button.

It also remains open on reloading the game

Strange. Normally it's closed when opening any other gui window - even from an entity that has nothing in common with D.A.R.T.

However weirdly I have been able to move the box to the side and am able to reopen another config window which I can close with the close button.

Was this for the same FCC? Was anything like a turret or a dart-radar build during the GUI was opened for the first time?

Could you please share a screenshot of the situation? I've opened a ticket on github (https://github.com/xyzzycgn/dart/issues/20) - if you have access to github, you could add it there

updated on github thanks

published 1.0.5 that should fix that