I have a Tranzport and recently (within the last two weeks) installed the drivers on my new PC. I used the latest driver from the Tranzport site, installed the driver first then connected the wireless dongle for the Tranzport and it worked without problems. (If you connect the Tranzport wireless dongle first, the install can fail or not work correctly).
I use Revo Uninstaller (the free version will work with 32 bit programs) as it will uninstall the program (with the program's uninstaller) but then searches the registry and folders for left overs and allows you to remove them. Also, if you uninstall, restart the PC before reinstalling as many times not everything gets removed until the PC is restarted and just uninstalling/reinstalling without the restart the problem can still be there.