Update install.md for Android updates

install.md

@@ -18,7 +18,11 @@ For more information about the current beta testing program
 1. Configure your phone to allow installing APKs through the browser. 
    See [this LifeWire article](https://www.lifewire.com/install-apk-on-android-4177185) for instructions.
 2. Download the latest Android version (see above for versions).
-3. Follow the prompts to initiate installation.
+3. Unzip the archive and extract the apk file in your file browser
+4. Click on the APK file and follow the prompts to allow the Installation
+
+Note: If the application was previously installed it may complete with a "not installed".
+Manually uninstall the app and try again.
 
 ### iPhone/iPad
 1. Contact the development team for access to the TestFlight program.