Lost my work renaming file

I’m new using Nomad Sculpt and have just finished my first project. After making video and taking screenshots to post on instagram (fortunetly that was saved), i changed the saved file name and the app went nuts. The project has been returned to a very previous unfinished version without all the rendering and the renamed file was gone and could not be recovered.
So i unninstalled and installed the app again. Now when I open Nomad it always opens the last project and not the new one (before it always opened a new project).
I’m confused…

Btw, i renamed the file on my documents folder, while the app was closed and everything was already saved.