Griffin AirClick USB doesn't work on Leopard?

My AirClick USB remote doesn't work since I've upgraded to Leopard. Contacted Griffin Technologies support, and they suggested that the software got corrupted during the upgrade process. (Of course, I noted in my initial report that I did a completely clean Leopard install, and then downloaded the latest driver from the Griffin website -- but I guess they didn't read that.

I'm a college prof, and need to be able to control PowerPoint presentations remotely while I wander around the room and wave my arms. I humored Griffin's tech support and uninstalled then reinstalled the software and repaired permissions. I also verified that the hardware dongle is receiving signals from the remote, and I verified that the USB port is recognizing the dongle.

So -- anyone else having the same problem? Any ideas how to resurrect my AirClick?