are windows files compatibile with mac scrivener 3?

I’m going to be working collaboratively, via drop box, on a big project; but I’m on Mac and scrivener 3 while the others are on windows. Are the files compatible? Or do I abandon the idea of converting my collaborators to scrivener?

The current official Windows version (not the beta) is 1.9 something and it is compatible with Mac version 2.9, not with version 3. So if you really want to collaborate, you need to download version 2.9, using the version 3 license number.

Thanks for the rapid and clear reply!