Set running app to None after the app exits.
Set running app to None after the app exits.

akshayaurora/kivy,matham/kivy,rnixx/kivy,rnixx/kivy,matham/kivy,matham/kivy,akshayaurora/kivy,kivy/kivy,matham/kivy,kivy/kivy,akshayaurora/kivy,kivy/kivy,inclement/kivy,inclement/kivy,rnixx/kivy,inclement/kivy