Hello
What i think the guy means, Is that if you have Encryption disabled and you have no use for encryption ... And you find yourself in a chat with delicate/private information or nothing you want a regular to see - You just hit the button and know that you are safe.
Like a Panic 'encryption' button Or a menu entry...
.. It asks for a password and then its encrypted...
Or...
The idea i like for this is, That if you set to remember the log file encryption password, and you automatically encrypt and log every chat - If something is a bit more important and sensitive and your password may a bit obvious - Click the button and it'll ask for a different password for that specific chat.
Though, Thats what i saw in it.
PS. Go Patchou!