Fix - Updated from OSX El Capitan Gold Master to Final Release, andbeta update keeps showing in AppStore

So, if you installed OSX Beta or GoldMaster versions, your account enrolled for pre-release updates.

Now, you installed OSX El Capitan from app store (final release, 10.11) but in AppStore -> Updates, Developer Beta keeps whowing you to update to version 10.11.1. This is because your account has now enrolled to pre-release updates.

To fix this, go to System Preferences ->