I installed Android Studio 0.1.9. Today I got and update to version 0.2 and of course I updated. After the installation I restarted Android Studio but now I get this messag
Open File > Project Structure > Project Tab
Android Studio has built in project structure menu to check and update gradle and plugin used in the current project.
Below Website gives a detailed explanation on how to update gradle and gradle plugin of Android Studio.
Update gradle plugin Android Studio