If this is not the case, you see only question marks in the submenu, then most likely there is an error with the help system or some VIs are not recognized in the driver library, try reinstalling the folder or download a new one. For the Macintosh: if you are unable to read any on-line reference help, you probably have two conflicting versions of Quickhelp? on your computer. Initiate a search and try to remove any version which is not located in LabView's help folder. Once you restart LabView the help system should work perfectly, you should now see only icons in the submenus.
If only a few question marks appear then some VIs may have been damaged or deleted. In any case download the latest version and reinstall the folder as described above.
All future versions of the driver library will contain all previous VIs to assure backward compatibility.