You need to install the original truck navcore you had before running TomTom HOME (such as Truck navcore 8.395).
If you haven't made a backup before this happened, then there's no simple fix I'm afraid. Delete everything except the map, voices, and ttgo.bif file, then install the truck navcore and patch everything.
After that, don't use HOME again. Maps come out so often (4 times a year) that the map "updates" from HOME are hardly needed.