Hi there I hope someone can help me. I am tryng to downlolad some free apps from Google to my Samsung Galaxy S3. I am having trouble getting some of them to work. Once installed the app is there but I don't know how to launch it - it says "Launch by Default, no default set". I have tried tapping everything but nothing happens. Examples : Bar Code, Cam Scanner.The Weather Channel,Currency Converter etc. Thank you to anylne who can help.