Your League Manager menu will have 2 choices, Remove Game Authorization or Remove Season Authorizations. When removing your codes, you should always remove your add-on authorizations first, then your game authorization last.
To Remove Season Authorizations, click the menu choice, type in the season year and click the remove button. Enter or your product code and click OK. Repeat this step for each add-on product that you have installed and need to remove.
To Remove Game Authorization, click the menu choice and enter your product code and click OK.