Stacks — X includes multiple unique designs inside of one powerful theme, and we refer to these designs as “Stacks”. There are currently four Stacks available in X, with more on the way. It’s like buying one theme and constantly getting access to new designs all the time!
X Theme 4.3.2 – January 23, 2016
This release includes a minor fix to our automatic update API to ensure that all third party Extensions available to our users via product validation can be accessed appropriately. Once you've updated X to v4.3.2, go to the Dashboard → Updates page in the WordPress admin and click the Check Again button to retrieve the updated information. If you do not see an updated list of updates at first, try clicking the button periodically until you see all plugins with an update come through.