BAP, yes I know it was the gpu that wasn't running, it was in fact 7623, one of the series of WU's that addresses Kepler and requires the new software. That's why I recommended getting the 7.2.9 upgrade from the beta software section on the Stanford site, it would likely clean all this up.
If you do not wish to do this, if you're running an earlier version of 7, I believe there are Add and Remove choices to address individual slots, maybe a right click? As I mentioned I'm not familiar with 7, it hasn't been necessary so far.