My Sketchup File Disappeared

I’ve been working on a Sketchup file for several months and it’s vanished from my Trimble login. There are two other much older files in the folder but the main one I’ve been using is gone. Something of note would be that I leave the window open all the time and this time when I clicked on the tab that had it open my interned hadn’t quite connected so I had to re-login, and when I logged in it was gone. I’ve had to reload it before and it’s never vanished.

Is there something I can do to get it back, or is there a reason it would have vanished?