NVIDIA GameWorks Integration

hi everyone
sorry if i ask any stupid questions, I am a new beginnner in Unreal, just download the merge branch 4.17.2 that made, and already debugged
I am a little bit confused, how can I open a project in Unreal with all the merged plug-in?

Right now for example if I want to use flex and blast at the same time, I can only use them in different project with two unreal project opened,
did I do anything wrong or open the project from the wrong file order?
Or I need to merge the plug-ins personally from Git?