I am trying to use the Android Device Monitor within Android Studio, but somehow I managed to remove all views.
I have tried resetting the perspectives, Window->Show Vie
I've experienced this same problem by using Window -> Reset Perspective. One should expect this to fix this issue, not break it. Go figure.
In any case, the DDMS workspace preferences are stored in %USERPROFILE%\.android\monitor-workspace
(e.g. C:\Users\my_user\.android\monitor-workspace
).
Just delete that folder and you're good to go.
On Windows:
C:\users\my_user\.android\monitor-workspace)
Where "my_user" is your user folder.
Note that you'll need to enable 'show hidden files' in the finder if you are on a mac. Then, the workspace directory is in users/your_username/.android/monitor-workspace.
See http://ianlunn.co.uk/articles/quickly-showhide-hidden-files-mac-os-x-mavericks/ for how to show hidden files.
That screenshot looks like you are running Windows. So, you could go to C:\Users\user3106174\
and delete the directory named .android
(or something similar).