I am wondering if I should enable this under General Settings.
Sure, why not…
https://forum.avast.com/index.php?topic=187679.0;topicseen
You can find (some) more information about the option in that thread.
CyberCapture - better detection of unknown and unique files via cloud technology… hmmmm, thats awesome…
Isn’t it active by default?
Yes it is, well it is on both of the systems I have avast 12.1.2272 installed on.
It is enabled by default (after the installation/upgrade).