MCPE black screen on start-up

As mentioned on a previous post (which didn't get a response from anyone!!!), I have black screen when starting MCPE.

Tried uninstall, restart, re-opening the app, nothing works:
Motorola Xoom
Android 4.0.4

I have since upgraded my Xoom to Android 4.4.4 and still getting the same issue. The logcat shows a tonne of Java.FileNotFoundException errors.

Please acknowledge ASAP as to when this will be resolved.

I want to buy Windows 10 Minecraft for my son for Christmas so he can play with his siblings on MCPE, but until I can get MCPE working, there will be NO SALE.