SmartWand: go to Design => Options => the Design Menu will open (outlined in green in the image below) => Select 3D preferences => general => (outlined in blue in the image below) => Go to Decoration Options on the right panel (outlined in red in the image below) => unselect the "Enable SmartWand" option (pointed with a red arrow in the image below)


Alternatively, you can use Main Menu => 3D => Decorating options = unselect Enable SmartWand.

 

Important: notice that, the SmartWand is activated by default, so, if you unselect this option => it will be deactivated while you use the program but if you close the program and then, you reopen the program => the SmartWand option will be activated again.