I recently downloaded DraStic DS DEMO using Aptoide and tried it out. Since it worked really well I decided to install Google Play and buy the full version. However, every time I launch the application I get a "license not valid or out of date" error with the error code 6.

Myriad Alien doesn't allow modified APKs to be ran, so even with a cracked version of the application I wouldn't be able to run it.

This issue has been bugging me a lot because other paid Android apps have worked just fine.

Any ideas?

EDIT:
I managed to remove the license check using a patching utility.