Hi,
You could add or remove all apps list in start menu in local group policy editor:
-Open the all users, specific users or groups, or all users except administrators Local Group Policy Editor
-In the left pane of the Local Group Policy Editor, click on to expand User Configuration, Administrative Templates, and Start Menu and Taskbar.
-In the right pane of Start Menu and Taskbar, double click on the Remove All Programs list from the Start menu policy to edit it.
You could select either Not Configured ,Disabled or Enabled.
When finished, you can close Local Group Policy Editor if you like.
Restart the explorer process, sign out and sign in, or restart the computer to apply.
Hope above information can help you.