Hey Timon,
I am planning to add the Universal Analytics in version 3.2; you can download the updated “header-functions.php” file here if you want. Otherwise, if you are planning to use a separate plugin, you can simply leave blank the “Google Analytics Code” field in the “Analytics” tab of the Theme Options panel – the old code will not work without it; if you want to completely eliminate the code, you can delete lines 93-103 of the theme’s “header-functions.php” file.
Sincerely,
Andrii / Satori Studio