I am running 1P Version 3.8.21 (build 32009) and recently upgraded OS X to El Capitan. I attempted to update 1P, but it would not extract the files and keeps giving me a "try again" tab which then repeats the same process. Also, I tried adding the extension to Safari (I'm switching from Chrome) and follow the directions (double click on 1Password.safariextz), and then click that I "trust" the extension, but then nothing happens and 1P is not available.
1Password Version: Version 3.8.21 (build 32009)
Extension Version: Not Provided
OS Version: OS X 10.11.2
Sync Type: Not Provided