Sygic Truck 13.2.7 DOES NOT WORK with the latest TomTom 2015.09 maps. It still supports latest HERE maps. Why this matters? Well I personally think that 13.2.7 is the most stable version and routing algorithm is almost perfect. It prefers paved road, highways, rarely it will pick some unpaved road. Tested in some cities in Europe. Impeccable routing algorithm. (Route preference = optimal)
Versions 13.5.3 and above work.
P.S Not sure if TT has truck attributes but just for testing purposes.