Yea. What can I say. I don’t want to fool around adding folders on my hard drive and deleting things from them, just to get them not to show up in the assets manager. if it’s an option in the software, and it’s in the documentation then I expect it to work the way it is supposed to. Sorry.
The prevention of deleting core assets was not working correctly. That is now addressed in Blocs 3.2 beta build 5 (coming later today)