From v2.0, Wapp pro is able to display a popup menu if you control-click or click&hold in the Application Switcher palette. When you change palette settings like application-ordering, icon size, orientation (horizontal or vertical), you have to tell Wapp pro to load these new settings by choosing the command "Update Application Switcher info" in the Help menu.
Due to incompatibilities with several apps in which help commands stopped working, I had to change the location of this command. From v2.6, it can be found at the end of Wapp pro's menu when (and only when) you hold down the control key before activating Wapp pro's menu. Be careful, this command WILL NOT appear in the Applications Menu (it will never be possible to do so). It is only available in Wapp pro's menu (in the menubar or as a popup menu) !!