Tried them and this is what happens: 1.Unchecking both of them, the program starts but the window does not show up eventhough the ACDHost which appears at the task bar says they are loaded. 2.Unticking th decorate and leaving the other has the effect of not being able to maximise the window (ad described in the original post) 3.Unticking the control windows and allowing the decoration has the effect of one.