Scrivener on Mac Was Updated But Windows Not

I use both Windows 1.9 and Mac 3.0 version. And I use Dropbox to sync the projects. When I open the Scrivener on Mac, the projects will be updated automatically, then I cannot open them on Windows.
What should I do with this?
Thanks all! … crivener-3

Many thx! :smiley:


Apologies for the brevity of the first message. Was using a dodgy iPad on which the keyboard only works intermittently.