There is a way to auto update the Stb Emulator Pro app by going into the Stb Emulator Pro app >Settings>Update Configuration>check mark the empty box for auto update. If you have installed an APK version or a version from a source other than Google Play Store, you "might not" get the latest update. Either way, its better to keep the auto update box checked as it may get an updated version from the one that is presently installed.
