Github Desktop not working properly

I have been using Unity and Sourcetree version control for about 2 years now. I stopped about 3 months back as I was involved in IT courses not related to github desktop. I recently started using github desktop due to unexpected really bad bugs in sourcetree. Upon trying to get things to work, I found that there’s no proper documentation even for a beginner to understand things properly. See my screenshot. However, when I don’t select anything, the processing hangs when it reaches the main screen where work is to be done. However, when I DO select a desktop app I’m using - VStudio - which is actually wrong and should be left empty, the processing seems to work properly. So can someone tell me what is going on?