I see Knowledge Xpert for Oracle Admin (Admin Kb) in the Help | About screen, but do not see an option to launch it.
Unlike Knowledge Xpert for Pl\Sql which is bundled with the Toad for Oracle installation, Knowledge Xpert for Oracle Admin (Admin Kb) must be downloaded and installed.
Go to Supportlink here,
Type 'know' | select Knowledge Xpert for Oracle Admin from dropdown list | Go | Select required version.
Please install the product but do not launch it when prompted and finish the install.
Once installation is finished, launch Knowledge Xpert for Oracle Admin, within Toad for Oracle.
The Admin Kb can subsequently be launched from the Desktop or Start Menu.