I'm in no rush, I already downloaded the 242 MB 8.5.2 update. The 1.7 GB is another story. It's a "setup file." Is this what you mean Jon D by it being an installer? The DVD file is over 2GB. that's what confused me. I thought it was a massive update. There is no 8.5.3 update for Studio as far as I can see. Unless the info on my account is incorrect. I'll google just in case. Who knows, it may take me to the old announcement of updates to 8.5. I did install both Producer patches. But Pro is not working right, which is why I am trying to get Studio going. My only problem is Kontakt. The sound cuts out now and then. I can get it back by hitting ! button on the Kontakt Player, but unless I can figure out why it's happening, I may have to shelve Kontakt. There go my best strings, Cinematic Strings.
Addendum: Did some Googling, I don't see an 8.5.3 for studio, it appears 8.5.2 may be the only one. One site I went to took me to a place called Sonar Music, with a cute girl smiling at me, and everything in Russian. Needless to say, I got the hell out of there asap.