In your FAQ it says:
If you also use the Mezzmo Android app to browse your Mezzmo library and select files to play in your home, then you can gain full access to your Mezzmo library at any time by entering a PIN code in both the Options dialog (Content Ratings page) and in the Settings on the Mezzmo Android app. This PIN code tells Mezzmo to bypass the content restrictions for the Mezzmo Android app and list all folders, playlists and files on your Mezzmo Android app.
I have found only one place where I can set a PIN code, its in: Tools > Options > Tab "Content Ratings"
But in your FAQ you say "and in the Settings on the Mezzmo Android app"
There is no other place that mentions a "PIN code", neither in the Android App itself (= on my smartphone), neither in Mezzmo "Media Device Settings" (= on my PC)

So where and how should I enter the PIN code again "to bypass the content restrictions"?
I use Android app v1.1.7 as viewing "device"