Official Display Driver Uninstaller DDU Download
The options below may have been on the previous version...I didn't look
-Fixed CM_Get_Device_ID in Unicode.
-SetupAPI : SetupUninstallOEMInf (use unicode)
-Fixes and enhancement to the driver removal logic.
-Remove audioBus is now default to false (because it *could* cause some problem on some specific system)
-AMD additional services and tasks removal.
-Added Software component removal to realtek audio.
-Chinese (Traditional).xml language update.
Still should be mentioned that the Clean Install option in the installer is quite sufficient for normal updating.
Except that it also wipes out all custom game profiles and DDU does not.