The first time i wanted to upgrade the standard freigther design to use better engines i saw that there were two components with no icon. i removed them and saw that one of the two freighter modules was gone. probably the one which was only eye candy, even though i wanted the game to only show functional components.
went back to the design list use the original design again. pressed upgrade and the game crashed.
started smart exception and reloaded the game.
tried upgrading the freighter again and the game immediatly crashed. but smart exception did not trigger.
debug.err see below