Hi Marcy.

Uninstall the driver and leave the device plugged in. Then in the device manager the PD should show up under something like Other Devices with a yellow question mark. (It should not reinstall the driver unless you disconnect then reconnect the PD). If it doesn't you may need to scan for hardware changed under the Action menu.

Right click on the yellow marked entry and update the software driver by browsing to the folder you downloaded. The new driver should then be recognized and installed.