title: App can't be launched after update, only option is uninstalling
body: <p>I updated to Android Studio 2.0 and debugged an app with it. I noticed that the debug-app isn't listed in launchable apps in the menu anymore and thought that this might be due to the new instant-run feature of Android Studio 2.0. </p>
  
  <p>Then, I generated a signed release .apk and uploaded it to the store. Two test devices installed the update but they aren't able to launch the app anymore. It isn't listed in the said menu too and Google Play's only option is to "uninstall" the app, there is no launch button.</p>
  
  <p>Where do I have to search for the cause of this issue and how can I resolve it? I already checked my AndroidManifest.xml to mark the Activity as Main:</p>
  
  <pre><code>    &lt;activity
          android:name=".activities.LoginActivity"
          android:label="@string/app_name"
          android:theme="@style/AppTheme.NoActionBar"&gt;
          &lt;intent-filter&gt;
              &lt;action android:name="android.intent.action.MAIN" /&gt;
  
              &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
  
              &lt;action android:name="android.intent.action.VIEW" /&gt;
  
              &lt;category android:name="android.intent.category.DEFAULT" /&gt;
              &lt;category android:name="android.intent.category.BROWSABLE" /&gt;
  
              &lt;data android:scheme="myapp" /&gt;
          &lt;/intent-filter&gt;
      &lt;/activity&gt;
  </code></pre>