Thanks. The option magically reappeared when I logged out and logged back in (no reboot), but it then vanished again a little later. I did reboot that time and it did reappear. Wonky game!!!
Thanks for the response!
I can't locate the demolish for sails on my launched ships. I've been able to demolish them in earlier versions of the game. Is it no longer possible to demolish sails on a launched ship? If it is possible, has the option been moved? If so, where?