Here the same, I just installed chronoforms 7 and it's a bit different compared to the previous versions. For example, i wonder what to put (or not) in the start and end page. And is there a possibility to change the style of the form, like you could in version 6.
The link you provided is a very old link, posted in 2013, this is not very useful for the newest versions. I would be happy if you have a manuel for the latest version.
We are preparing some tutorials for v7, but if you try to create a new Contact form then it should be very easy, you just need some fields in the "start_page" and the form should work!
ChronoForms7 Video Tutorials
ChronoForms7 Video Tutorials