I just now got this problem fixed on my laptop that runs Windows 10. When I first got the Tom Tom, it had me install TomTomHome NOT MyDrive Connect. So, I've searched and searched for the answer to finding the drivers and resetting and restarting and can't you just take my firstborn child or my right arm or should I just sell my soul, or what?
After much frustration and hair pulling, I decided that since I could not find a version of MyDrive Connect that is listed with the Via 1605, that I would download a version of MyDrive for the Via that looked most like mine (Go to https://www.tomtom.com/en_gb/mydrive-con........ Scroll until you see Download for MAC or PC...Download and install) . Instant fix. Where it would absolutely not be recognized by the TomTom HOME app, it immediately recognized the device, even though it was listed as a program for other TomToms but not mine.
Hope that helps!