Need to convert a file in a format you can't access to a format you can work with? Before you give up and delete the file, or spend good money to buy a program that may or may not be able to make the conversion, try Zamzar. It's an online file conversion service (free for low-volume users) that might be all you need to make the conversion and keep on truckin':
TIP: Windows user, having trouble opening a document? Use OPEN WITH and select Notepad, then save the resulting Notepad document as TXT or DOC. You may need to do some reformatting, but you haven't lost the document completely.