Norton Security currently available only as 32bit application, or also 64bit?

Hello,

Is Norton Security currently available only as a 32bit application, or is there also a 64bit version?
I'm using Windows 8.1 Pro 64bit, and in the Task Manager I saw that I'm running Norton Security 32bit.
I didn't see any option for downloading a 64bit installer when I downloaded the trial version of Norton Security Deluxe, directly from Norton's web site.

Thanks