We're sorry to hear you're having issues with installing the most recent update.
Please follow the steps below:

1. Settings -> Applications -> Project QT -> Force Close;
2. Settings -> Applications -> Project QT -> Clear Data;
3. Uninstall Project QT if you have it installed;
4. Restart your phone;
5. As soon as your phone starts, direct your browser to Nutaku to download the Nutaku Android Client for automatic game updates. Although we do not recommend this, you can directly download the game from here, but you will have to update it manually and this might cause bugs if you continue using an outdated version: https://www.nutaku.net/games/app/project-qt/