I downloaded the trial version of dBPoweramp to try it out. Used it to rip music files to my pc then sync to my android phone. It worked perfectly ... until it didn't. When the trial period ended I bought the regular version. Now when I rip files to my pc that part works but when I try to transfer the files to my phone it looks like it's working but there's nothing there on the phone. Also, the files I transferred to my phone earlier are also now gone. Any thoughts about what's happening and how I can get this process working again?