I have the same problem with Licence Error #16 !!! I wrote to Poweramp support but this is useless. He told me to clear cash but its "CACHE" of Market Play app.You dont even write it right! I tried to uninstall Poweramp and unlocker and install them again.Nothing worked! I reflashed my intire firmware on LG G3 and it worked but only for a few days. I never used Luckypatched or anythinig! This aplication is WASTE of money and support is useless.I'm going to install cracked Poweramp when my paied version doesnt work !!