Help Menu is missing

[Strokes]

My context help is no longer available for any labVIEW function. Similarly I can't access control's properties like those of a chart. I get this pop-up window looking for launch help.vi

I haven't deleted anything (as far as I know) from my National Instruments directory so not sure what's going on...

[LV_Pro]

You may have a corrupted install. If you have the disks, try performing a repair (Windows:  Start:Control Panel:Add-Remove programs)