I'm another unhappy customer: Yak-3 and F-104.
I amused myself for a very long time batting this back and forth and eventually decided that CS had won.
They are unbelievable; I will never, ever buy anything direct from them again.
Likewise all emails containing the words "Captain Sim" are consigned to the junk container.
Having learned the hard way, I bought all my C130 and B757 variants from Flight1, and they are great.
It seemed that to recover the Yak and Starfighter, a visit to Flight1 did seem the only solution.
Well, almost.
A kind-hearted soul on another forum put the ripped files up on Rapidshare for me, after I convinced him I had the necessary purchase credentials.
I absolutely do not condone piracy, but sticking it to CS gave me total satisfaction in this instance: a case of Consumer Rights.