What background?
#Actually Tigad have 12 icons background with 12 different shape and colors, you can see this in tigad (appdrawer tab). Try other launcher instead of asus launcher. Maybe Asus launcher doesn't support multiple icon background.
關於此應用程式
Version 3.3.9 - Added and redesigned 322 icons - Premium req. price updates... sorry - Dashboard updates Version 3.3.8 - Added and redesigned 166 icons Version 3.3.7 - Added and redesigned 158 icons Version 3.3.6 - Added and redesigned 242 icons Version 3.3.5 - Added and redesigned 186 icons Version 3.3.4 - Enable restore purchases