@phuong
What do you mean that you can use it but you cannot find it?
The Adenita module is not an App but a set of editors, therefore it will be present in the Editors menu, e.g. Editors > All. To easily access the most used editors, you can add them to favorites by clicking on a star next to its name.
To check whether you have the module installed, go to Interface > Show log, and type Adenita in the filter - you either will see two lines (red if there was a problem loading a module) or nothing if it is not installed at all (see the image below).