Or you guys could have just gone to this thread in post 1:
Better late then never I guess.
I have links directly too the firmwares for both the 500 and 600.
I would think at this point the latest software would be installed. Indeed you listed it and I assume you will update post one if new software becomes available. The problem is what's in the future and then remember to go to post one yada. Probably easier to remember just check the sony e support site.