I have some Devolo wall heaters and left a review saying that the app is awful as I had changed my WiFi password and now nothing connects. I have tried removing and adding the devices back to the app and have been suggested to send the "distribution network operation video" to them. What on earth is a "distribution operation video"? Again, thoroughly useless. Edit - twice now, you have said to send a "distribution network operation video", yet no one has explained what that it actually is.