It is good but I dont know hot to get stars picture

I am a Japanese.
I and my wife are tripping in Tateshina kougen in Nagano prefecture Japan.
Last night I would like to take some pictures with moon and stars.
So I decided to buy this application.
But I cant understand that how to take moon and stars pictures.
So it was a little bad.
Thank you!!

In the Bed about ProShot, v3.3.1