Truck City v0.53 has just been released. This is the change log:
Improvement: added several missing icons for factories, especially oil and space related
Improvement: loading port construction menu now shows factory icons
Improvement: production window now shows factory icons
Bugfix: in the Map editor mode, save and load windows did not update after saving a map
Bugfix: clicking while the loading screen was still visible is not allowed anymore
Bugfix: fixed issue where the tutorial window might block clicks to the lateral bar