Hello Nigel. As far as I can see, it is possible to use offline activation for Captain Sim products. Apparently the option is built in to the installer. To be honest, though, I don't think they make it easy as they now encourage online interaction in everything they do. They no longer sell boxed products for instance.
The activation instructions appear to be geared to having an Internet access PC adjacent to your FS PC. When you choose manual installation the installer generates a text file which has to be transferred to the Internet PC and sent to CS who generate an activation code and return it to the Internet PC for transfer back to the FS one.
So, in answer to your question, it looks like you can do it, but without any internet access at your home, it looks like a long, tedious process
No phone support either.
Ian
