Deleted my project!

I added some time ago the sci-fi hallway to my project and for some reason it created a project alone in the launcher. Today I tried to delete the sci-fi hallway project and it deleted my project together! I dont have a updated backup, I really need it back. How can I recover a deleted project? Thats insane…

Another report here: https://answers.unrealengine.com/questions/229096/deleting-project-removes-wrong-project.html

thanks.