I have some problems with the update feature for some apps. I cannot update them via Google Play, because there is no "Update" button, only the "Installed" button. However, there is clearly a new version (I've checked the version number of the installed app with the one offered by Google Play). Also, under "My Apps" in Settings, these apps are not listed, even though they are installed and run just fine.
What do I have to do, so that ALL apps can be updated, either automatically or manually through Google Play?
I am using a Nexus S with Android 4.1.2 installed.
Thank you very much for your time!