Access Android native settings manager
To expand on Andrew's comment, Settings is a core system app that is tightly integrated into the ROM.  There is no way to replace it without flashing a custom ROM, and modifications like enabling or adding features would require building the Android source for your device.

If you are rooted or can use ADB, etc., there are a number of other ways to manage applications and settings &mdash; for example, uninstalling apps.  Feel free to search the site and ask another question if you want to do something specific that hasn't already been covered.