If you are using version 3.0 of our theme or higher then auto update option is available for you. Go to Dashboard > Updates > choose XStore theme and press update.
Also, you can use manual update via FTP, watch our video tutorial http://xstore.helpscoutdocs.com/article/58-how-to-update-rate
Before the update, please, do the backup of all your files, DB and Theme Options just in case.
