'restore defaults' on the security slider puts me at high security
When I start my shiny new Tor Browser 4.5a5, it suggests that I open the slider, so I do. Then I move it from 'low' to 'medium' to see what it does. Then I click 'restore defaults', and voila, now I'm at high security!
This is unlikely to be what we meant by the defaults.
To upload designs, you'll need to enable LFS and have admin enable hashed storage. More information