How to force the installation of a programme? How can I force the installation of a programme, specifically "Simple Sidebar-1.2" in place of "Simple Sidebar-1.3", in android 4.3, on a Samsung Galaxy GT-I9300. When I try to install it now it has a long read-in and then just stops saying that it is not installed.
You can't "downgrade" an installed app to an older version. First you need to uninstall the app from your device, and only after that can you install the older version from the APK.