If you need to update your Revel KDS Application on your ViewSonic VSD243, use the steps below: 

1. Open APKPure from your KDS home screen:
   
   
   
2. Locate the App Management Icon in the upper right and tap on it:
   
   
   
3. All available updates for apps will appear here. Tap the Update button to the right of Revel KDS:
   
   
   
4. A pop-up will appear indicating that your tablet is not allowed to install unknown apps from this source; choose Settings to continue:
   
   
   
5. Make sure the slider button is green to allow APKPure to install the Revel KDS update:
   
   
   
6. Confirm that you want to install the update: 
   
   
   
7. Swipe up from the bottom of the screen to show the control buttons and hit the back arrow:
   
   
8. You will be returned to the App Management screen. Your app will no longer appear on this screen once it has been updated: