Cannot get Scrivener for Mac to sync with my iOS files stored on Dropbox

I just loaded the latest version of Scrivener on my new MacBook Air. When I try to open a file from Dropbox, it says that the file is from an older version or is corrupted. I am able to open the file from my iPad, so it is not corrupted. I have several projects stored on Dropbox and would like to sync them all to my new Mac. Please help. Also, I created a new project on the Mac, but my iPad does not see the project file.

Have you installed the Dropbox app on the new Mac and logged in to your Db account from it?