I am interested in getting the Space Shuttle for FSX and while doing a web search, I came across a link to a Captain Sim store page where it says it is free (price is set to $0.00), but I am unable to check out.  When I try, nothing happens.

Then in the store when I was looking at FSX add-ons, I found it there, but it costs $19.99.

What I also noticed is that somehow the links to both of them are exactly the same, I don't know how that is possible.

So I am confused, is it free or not?  If it is free, how to I get it?