I can't open my Passport!

HI, can anybody advise why I can’t open my WD any more please? When I plug it in and click to open, it brings on another box asking -choose the program you want to open this file? And there is no option for passport program, it gives options as picture manager, adobe flash ext. Please someone help?

Windows detected multiple types of content on your drive so Windows presented you with the “AutoPlay” window.  You can right-click on your drive within “My Computer” and choose “Explore” to view its contents.