I think the original download is not supported by the author anymore. Instead, there is the successor spacecraft4, which should be backwards compatible. See here: https://www.orbiter-forum.com/showthread.php?t=36556
I think the original download is not supported by the author anymore. Instead, there is the successor spacecraft4, which should be backwards compatible. See here: https://www.orbiter-forum.com/showthread.php?t=36556