Holy fck, this guys is noobed out of belief. Like super noob.
Cia files on your sd card are just Cia installers the actuall app is inside your system and can only be uninstalled using a app installer IE FBI, Devmenu, SOON2 etc.
Whenever you wanna update a scene program on your 3DS, you must use an app installer to delete the old program and install the new CIA version of the program.
Ala FBI 2.2.1 etc.
In this case you must install the NEW VERSION of the FBI before deleing the old version cause you what you wanna install requires you have itself already installed.
--------------------- MERGED ---------------------------
He would only delete it after he installs the new FBI 2x. Why would you delete something you need to use to install the new version if you haven't installed the new version?