If you go to this link you will notice that Scrivener has been releasing Beta versions of the next update. Now that it is in Release Candidate mode, that means it’s nearly ready and has been quite stable for some time.
[url]Scrivener 3.0 Beta - Release Candidate 10 (Download Links & Change List)]
So whilst the latest actual version is 1.9.16.0, the latest RC Version is whatever is listed in that link.
It’s free to download and if you follow the steps listed you can run both versions side-by-side.