Upgrade to 378.56_2 from 376.47_0

I just ran the upgrade from 3.0.0.4.376.47_0 to 378.56_2, the process said successful but after a reboot the Router still shows 376.47 as the valid firmware. Do I need to reset default values first or did something not go right with the upgrade?

I have a RT-AC68R and I used this file: RT-AC68U_378.56_2.zip

thanks