Please can someone help? I am the project owner and have logged on to find that the Project file is missing from my computer.

I am the project owner and have logged on to find that the Project file is missing from my computer. I created the organisation and project and added people to collaborate on the project. I installed the latest version of Unity but since then the project seems to have gone missing. It is not in any of my folders. My other collaborators can still access the project but I cannot. Is there a solution for me to recover the project?