There are two ways to do this.
This is the recommend way if you are getting started with Send/Receive.
Back up the project.
Restore the project using a different project name according to the limitations mentioned in FieldWorks project name.
In the General tab, edit the project name in the Project Name box.
Collaborators should coordinate any name changes or uses of the Restored a Project dialog box (recommended).
FieldWorks Project Properties, General tab