Delete folder: Application Data\CorePlayer\ in Phone Memory
This gives you the ability as stated before to gain acces to entering the serial.
Then just enter the serial in the below link. I never did the whole removal of app. I just deleted that folder, added the serial, and it has worked for both my phones.
http://freetexthost.com/nvteh2zoeo
It hasn't been Blacklisted as of yet.
Let me know how it goes, good luck, thanks.