can not select .cdr when trying to open files

Hi

For a small while now i can't open .cdr files from within the program.  when i go to open a file, i can't select .cdr under file type.  I have to open the folder and select the file i want to open in coreldraw.  this feature did work and now its not there, as if the .cdr file type has been removed.  please can someone help me with this problem?

Regards

Tim