Perhaps a try/catch could be put around the driver loader when starting HarBal that loads OS's default drivers if the chosen driver does not exist anymore. Then have a more firendly dialog popup that says "Har-Bal could not find your selected driver and has reset itself to the default OS driver".
Essentially saying "Our app is so smart it knew the card wasn't there and loaded an alternate driver" rather than the big, evil "ERROR" message
