|Looks like Outlook Express is using Inbox(1).dbx file for data. |
First back up Inbox.dbx with 10KB of data to a safe location.
Then try to import the emails from Inbox.dbx in the OE folder. If you can import the emails, then you have recovered your emails.
If no joy, use one of these utilities to extract the emails from the Inbox.dbx file.
If it doesn't help, look at the answer here: https://social.technet.microsoft.com/Forums/en-US/d56c0d32-d857-4c22-8c4e-23332328e42a/i-need-to-outlook-express-recovery-tool?forum=olmdiscussion