title: Google Play Store showing Open button instead of Update button
body: <p>I updated my app to the Google Play Store last night. 
  Before the update, my App version was 2.3.
  There was some problem in version 2.4 so after another 2-3 hour, I updated the app again.<br>
  The current version on the play store is 2.5. </p>
  
  <p>My Problem is: If the old version is installed on the device and open play store Google Play Store showing <strong>open button</strong> instead of <strong>Update button</strong>. I want <strong>update button</strong>. What is the problem? Any solution?</p>