Capndirk: I actually have the same issue with Poweramp. I find that if I kill the Poweramp process and then start it again then it will find the songs and play them normally off my USB drive without having to go in and tell it to re-sync them all. I feel like what is needed is a method for Poweramp to kill it's own process when the device shuts down, or for the device to kill all processes itself and then for Poweramp to be able to restart itself again on power up. I don't know what the exact solution is here but as I use Poweramp exclusively on my Atoto head unit, this problem is unfortunately enough of an annoyance to make me look for alternatives. That said, I know for a fact that I won't find anything as good as Poweramp is.