Here you can view Community Builder Profile Pro extension and try it in use.
There are 3 demo Community Builder profile types on the site:
You can log in to backend and customize a profile type by yourself. To view the changes you've made log in to frontend via CB Login form on the left. Check that the tested profile type is selected in field Profile Type on profile edit page. Use Community Builder menu on the left to access any Community Builder page.
If you can't enter, then someone is already logged in with these credentials. In this case log in using another username (demo2, demo3, ..., demo10) with the same password (demo).