The Apple password is prompted by macOS, and of course is not accessible to the application (nor is your email address, or your identity), even though the password prompt window is displayed from within the app. But I agree with you, it is unfortunate that Apple did not choose to open the App Store app to prompt for the password, which would be less confusing.
No new version is currently scheduled for the near future.
Yes, I am the same and the app has not been hacked.
Regards