Windows 8 Build 7850: How to unlock Explorer Ribbon

[riso]

How to manage to get Explorer Ribbon working:
Hit Start Orb.
Searchfield: type REGEDIT
Go to HKEY_CLASS_ROOT
create this key in registry:
HKEY_CLASS_ROOT\CLSID\{4F12FF5D-D319-4A79-8380-9CC80384DC08}
create a string value in this key called "AppID", set its value to "{9198DA45-C7D5-4EFF-A726-78FC547DFF53}"
now start a new explorer window.