Additional Ships on Bases for Purchase

[The_Celt]

Some time ago when logging onto the game and a character there was mentioned that on some bases there were more than three (3) choices of vessels to purchase.
There was also mention of a file or patch to see these additional ships.
I thought I downloaded such file or patch but it appears I did not.

Can you please provide information on where I can obtain this file or patch and how do I download it and where it should be stored.

I am not very PC aware so if you could provide the process in simple steps it would be appreciated

Kind Regards
The_Celt