If Thunderbird has stopped working and you still need to access your MBOX emails, you can use a dedicated MBOX Viewer instead of depending on Thunderbird. I would recommend MailsDaddy Free MBOX Viewer. It allows you to open and browse MBOX files through a simple interface, where you can read email messages, check attachments, view sender and recipient details, and explore stored mailbox data. You don't need to import your MBOX file into Thunderbird again just to read your emails. It's a convenient option when you want to access old mailbox data or retrieve important email information while troubleshooting Thunderbird.