Congrats to the new v8!

I must have missed something. Is there some documentation on how to use the new knowledge module?

In new version 8, how do you search for a specific document in the database?

How do I upload a document thats not an attachment to something. I dont want confidential documents as a attachment to a contact....because to many users have access. I want to put it in a special folder and restrict the access.

Is that possible any more?

Thanks in advance