App.Version not working!?

Hello,
In Xojo “Build Settings” I completed:
Major version = 1
MinorVersion = 0
but when I execute the following command in a dropdown menu

MessageBox(App.Version)

I get an empty message!
Why ?

App.Version is its own String, not a compound of the Major / Minor / Bug fields.
You can change it with the “Version” field below the “Auto increment version” switch in the Shared Build Settings.

Resolve here:

Thanks