EDIT: Sure enough, it was my abysmal internet. With faster speed everything downloaded and checked out correctly, and I now have a working TV tuner! Thanks again.
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Must be something on my side then. Though it says 'done' in the status, I wonder if my poor internet is causing the download to time out or something like that. I'll see if I can rig up a phone tether or maybe take the whole thing into work and try again.
Thanks for checking.