In Defold i have the possibility to download previous version of my project?
Yes, but from the command line using Git or from a Git graphical client. A Defold project is a normal git repository with all of the version control of Git.
SourceTree is a nice client.
Can you give me some instructions how to connect through SourceTree to Defold repository because i am not familiar how to connect through this program.
Open SourceTree, drag the directory with your branch into the SourceTree window. That's it.That's the directory that has game.project in it and a hidden .git subdir.
Thank you a lot.