How to Downgrade Your Android Apps
Full Tutorial: http://gadgethacks.com/how-to/downgrade-apps-your-galaxy-note-3-other-android-device-0156697/
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In this tutorial, I will be showing you how to downgrade your Android apps to a previous version. Manually downgrading an app means uninstalling the new version and then installing the old version in its place. This takes too many taps and there’s a better and faster way of downgrading.
Using an app called AppDowner, all it takes is the old app as an APK file and a single tap of the button to perform an app downgrade. Note that AppDowner does require root access to operate.
For more information and download links, check out the full tutorial over on Gadget Hacks using the link above.