There is no way to download the wrong beta client unless someone from the previous beta weekend shared their download link with you which is a forbidden NDA violation, or you clicked the link to download it in the original email, which the new one specifically said not to do. They also stated flat-out that this was a completely new build and that you must uninstall the prior one if you were in the first weekend beta, and download the new one. This isn't the shack/PWR, so I won't denigrate your friend that downloaded the old client here, but...yeah.
Tell him to RTFM, haha.
Nobody knows for sure what they track, but it's obviously a LOT. They do not want the general public knowing anything they don't specifically release.
Also...they are really holding back on taking good screenshots. 99% of the screenshots on the www.swtor.com
official site are mundane compared to what they could
take in the game, right now. They're clearly holding back to release better stuff closer to launch, or just holding back period to let there be more surprises for purchasers of the game; don't know.