FileSelectPopupEx dialog box doesn't display the file type

When I bring up a file selection dialog using FileSelectPopup and ask for files with a specific extension, the dialog box displays the extension correctly in the "Files of type:" ring control.  When I use FileSelectPopupEx, the ring control is there, but it's blank.

The attached screenshot shows the difference.

I'm running LabWindows 2015 f1 on Windows 7 Professional.