Android Question Name change didn't affect top of the app, why?

I have modyfied the Walkie Talkie App and changed the name from "Walkie Talkie" to "DoorBell". But when I run the app, in the upper corner it says still "Walkie Talkie", why and how can I change it?

I have changed the name of the .b4a file, the Package name and ApplicationLabel. Even in the manifest file is nothing about "Walkie Talkie" but it still shows up.

I have attached my file and a screen shot, maybe someone know the answer?.