To update your RFID gun software. Open up Google Chrome on your RFID gun
Then go to www.eyesoft.ca/install to find the latest software version of es-scanner-x.xx.apk
Complete the download
Once the download completes, open the file by clicking it in the notification shade
When prompted click Install
If you get an Installation warning click More Details
Then click Install without scanning
Once Installed you are ready to use the new software.
If your application is not installing try uninstalling the old version by pressing and holding its icon and then installing the new version