Having some trouble getting the unified maintenance console installed and set up. The installer asks for the suffix of the device model, and won't let me select none as an option. Our TDA is pretty old, not sure if that means anything, but it doesn't have a model suffix that I've been able to see. So, I tried just choosing one of the model suffixes just to get the software installed, and when I try to connect (via USB), it tells me that the program was installed incorrectly, I've since uninstalled, reinstalled (run as admin.) and restarted a heap of times. Any suggestions?