I purchased a $5 "credit" from Paypal that Android PIT linked me to when purchasing an app you featured called Thumb Keyboard. I did not previously have the Android PIT app on my Samsung Galaxy S3 I535, so I downloaded and installed it. When trying to install the new app Thumb Keyboard, it prompts me to pay again. I am not getting any "synchronize" option on my phone under the Play store, apps. How do I get this app without having to pay again?