We need below information in order to debug the issue 1. Did you download the tester from below url?
http://www.amazon.com/dp/B00BN3YZM2 Or you have installed the apk from below location? Apps-SDK.zip -> Android\InAppPurchasing\PreviousVersions\1.0\tools 2. Which is the device that you are testing on? Please provide the device name and OS version? 3. Could you please paste the error that appears on logcat after the crash?