File Extensions

Long time user, first time typer :)

We recently had to upgrade to a new cpu (windows 7) and now when I try to open or import in CorelDraw I have to type in the file name + the file extension (or search and click on the name in a list)  I have a thousand files all named numerically so all I've had to do in the past is just type the file name (ie 110), hit enter on the keyboard and the file would open or import.  Does anyone know how to change it so I don't have to add the extension?

 

Thanks!!

Sue