ORIGINAL: adamsolo
ORIGINAL: Bingeling
And I am pretty darn sure I retrofit my spaceports from the ship list which is not so much hassle.
I can't retrofit my small space ports from the "Ships and Bases" screen, either by double clicking the space port on the selection panel or when you open the screen yourself. I can only retrofit to later designs when I right click on the space port itself and choose retrofit. In the former I only see small space port design, in the latter I see all designs. I have the latest Shakturi version (1.5.0.8).
It does work Adam.
It may not start immediately though. There is always a short delay before it starts. Also, keep in mind that the planets also build constructors, colony ships, and defensive bases. If any of these are queued up, the planet must first finish these before starting its starport upgrade...the planets have to build according to their queue just like the shipyards.
My advice is try it again, give it a little time and see if it starts. It should as the queue is cleared.
Here is an illustration:
1. I clicked the upgrade icon.
2. I can see it is queued but not yet building.
3. The retrofit has started.



