I dont have a demo but I have been playing with BuddyBoss the last few hours and they provide a demo sandbox through. You can access it here: https://demos.buddyboss.com/online-communities
It even allows you to go into Wordpress Dashboard where you can see how everything is setup in settings etc. Imho this is better than one click import because when you one click import you usually have to manually delete things once you get a hang of it.