The intended, safe method is actually very simple:
If you're referring to an APK (Android Package File) related to "Quad Touch" that doesn't require a license, here are some general points you might be interested in: Quad Touch Apk No License
For those who are confused by the "No License" error, here is the actual fix. The intended, safe method is actually very simple:
Quad Touch includes multiple engines for each game. You can switch them by tapping the on the left side of the main menu . Quad Touch Apk No License