@Stefan_Blom Thanks, the file has definitely been deleted so it's not there. I've emptied the trash since then. I've downloaded Disk Drill but can't find it on there either. It's just frustrating that I can see it on the recent word documents!
Yeah, that's what Disk Drill is isn't it? It was saved in downloads but my downloads is within my dropbox - not on my hardware. I didn't even delete it though, I uninstalled Dropbox that day because it wasn't letting me open offline files and everything from that day has disappeared. I've looked in the deleted files on dropbox online and it's not there either. It might be on Disk Drill but it's too complicated to locate!