Checked emails first thing this morning. Fine. Closed down.

Rebooted about 45 mins later and all my messages in the inbox have gone. I
checked the inbox.dbx and discovered that it was empty, but another
inbox(1).dbx had beed created which has a stuff in, probably my original
inbox emails.

There was also another deleted(1).dbx folder

What's the easiest way to get these back to their original place please?