I received an email with an attached graphic that will not open. Web administrator shows it to be a .dat File Extension with no indication of the file format. It lists software or information available at Corel WordPerfect Merge Data, and clicking on to that shows a variety of Corel software. I cannot contact the originator, as email was forwarded several times. How do I find the software used to create the file, and how to get it once identified? I really need to copy this picture or drawing.