I had no version of IMAQ. The only thing previously installed was LabVIEW Pro 6.0.3. It had a small handful of IMAQ widgets.
It should not matter what version I previously had though, even if there were one. The installer should be smart enough to know what to do.
It generally was, but this single missing VI causes a few others to break. Based on the mass-compile results it seems to be the only missing VI.
Mark