SkyController 2 Update

[Dave Phantom]

I Installed the latest of FreeFlight Pro v5.2.7 (3/10/19) but it seemed to messed up DISCO Controller firmware. Uninstalled and replaced with Earlier Version 5.2.6 (23/9/19 from apkmonk.com). Still no luck, uninstalled this version and found remaining 'remnants' of the FreeFlight Pro App and deleted these, cleared cache, restarted tablet etc etc. Reinstalled again - Nothing works, just keep getting the same message "UPDATE REQUIRED - Your device needs to be updated". Been trying everything possible through internet searches for the past two days - nothing works, tablet, drone and controller batteries completely drained with trying. Am I left with an expensive door wedge? Any help would be really appreciated.