Eudora In box disappears


When shut down earlier today, got hung up, so I forced down by holding the power key.
I had quit everything before power down.
I launched Eudora this evening (6.2 w/10.5.1, been fine for a week or so that I've been in Leo).
In box lost all the previous messages that were still held there. I usually move most messages into other mailboxes after their arrival. But there was still about 80 in the In box.

The In box still shows a size of 1M.

Anyone have any ideas how it might be rescued?