In Settings->Security on your Android device, find the option Unknown sources. Check this option to allow installation of apps from unknown source.
Click the above link to download "Abc Session Viewer.apk" to you Android device.
After download, you should see an option to Open the file. Click on this option and you should then see another option to Install. Click on the Install option to install Abc Session Viewer.
After installation, go back to Settings->Security and uncheck the Unknown source option.
Remember that this program does not run on Android 7 or above.