For the people having a difficult time figuring it out, here is how to get off that banned account no factory reset or log out required...
Happy Day! http://www.youtube.com/watch?v=2i38hx_Bee0
TESTED ON 4.2.2 FIRMWARE
STEP ONE: FORCE CLOSE CC AND CLEAR DATA
STEP TWO: LOG INTO ANY NON BANNED ACCOUNT
STEP THREE: RUN FOREIGN VERSSION OF CC
STEP FOUR: SWITCH TO NON BANNED ACCOUNT IN FOREIGN VERSION, THEN EXIT
STEP FIVE: GO INTO JRUMMY DATA>DATA>(FOREIGN CC) COPY FILE FOLDER AND PRESS UP
STEP SIX: GO INTO COM.IGG.CASTLECLASH AND PASTE FOLDER (IF THERE ARE ANY OTHER FOLDERS IN HERE THAN LIB YOU DID NOT DO IT RIGHT, MAKE SURE YOU CLEAR DATA FIRST)
STEP SEVEN: IF CASTLE CLASH CRASHES AFTER THIS, UNINSTALL AND REINSTALL AND YOU ARE SET, NO NEED TO FACTORY RESET OR LOG OUT OF ANY ACCOUNTS Note - Don't do the uninstall at the end unless CC crashes on you. None of my phones crashed after applying root fix, only genymotion did.
http://www.youtube.com/watch?v=maRfLXmId5U&feature=youtu.be
ALTERNATIVE METHOD, TESTED ON 4.1.1-4.1.2 Firmware
STEP ONE: OPEN JRUMMY, GO TO DATA>USERS>0>com.igg.castleclash and delete the folder
STEP TWO: Force close CC and uninstall
STEP THREE: Reinstall
STEP FOUR: Enjoy!
IF this does not work for you please tell me which firmware you are using on your phone and I will attempt to investigate further!