I hope you're well. I'm sorry to be asking this out of the blue, but I have a Proline android tablet (M7453GDC). They're running android 4.1... The problem is we want to use it for data capturing, but our app needs android 4.3. I cannot for the life of me figure out how to update these tablets. I tried going via settings and doing it on the tablet, but it says I need an update.zip file. I was wondering if you have any advice