Update a font I got for free?

Hi

I received part of the Garamond Premier Pro font family as a gift from Adobe for registering one of my versions of InDesign or Creative Suite. (It's been a while; I can't remember which it was.) I see now that the font has been updated several times and probably fixes a kerning error I'm seeing. Does anyone know if it's possible for me to get a free update to the current version and, if so, how to do it?

Thanks.

m.