I feel a little dense because I've actually never gotten an update for anything I've purchased from this store.  So I did go to the marketplace - find GND4 and went to add her to my cart because I assumed the update DL would come that way.  Then it tells me "tough cookies, you already own this" - yeah I know so give me the update.  Well it wouldn't.

So I went and searched through all my past orders (gosh I wish there was an easier way to do that) and found it.

I just re-downloaded the zips from there.  Is that the correct way to get the updated zips?  

I am:  aka Velocity3d