I think you have original program.
I also think something is lost in translation. When you say "cart is from 2011 and want to upgrade it" you mean "map is from 2011 and want to upgrade it"?
You want to update maps or want to update all?

If I am correct, you can not simple update maps but have to update the program as well. More, the sd may be locked and coded, meaning very hard to use another sd.
Normally, it's very easy to replace the program and maps with stuff from this site.
Again, we need more information. You have not answered all my questions in post 2. When we know more, we can try to throw the rescue ring.