Ok, I can live with this. It is much better to only need to correct 1 value than having to set up all the configuration items each time WACUP loads.
Your reply also explains why it is not possible (at this time) to do more (enabling blocked presets, allowing preset changes, etc.) than the plug-in already allows.
I've also noticed that clicking on the configuration window frame in certain places will trigger loading the iZotope website in an external web browser. This is also easy to avoid, if this action can not be blocked.