Lost my latest project

A few days ago I started a new project in SketchUp (Web, free) and I had been working on it everyday. I might not have manually saved it, but it seemed to have been auto-saved all the time. Today I closed and reopened my browser (Firefox) and all tabs were restored. Unlike before the SketchUp tab went to “Home” (which lists all projects) instead of loading the project I was working on. Unfortunately my project was not listed there. Did I lose it or can it somehow be restored? I spend quite some hours on this project. I last worked on it last night (11th of May).

Go to connect.trimble.com and sign in. Do you see the model file in your collection of files there?