I just did a clean install of Yosemite, then installed the El Capitan beta. Since I have a developer account, I just installed it from my purchased tab in the App Store. After the install, it does not show that any updates are available. I was expecting it to install DP1 and then upgrade to DP3, but instead, it's not showing anything new. Is it possible that it already installed DP3? I am not sure, kind of hard to tell. Is there any way to know? Thanks.