Download Android KitKat 4.4.2 stock firmware for TV110 TV Box from here or here. Download previous version from here. Flash it using AMLogic USB Burning Tool v2.0.0.140306_Alpha like in this tutorial.
Archive： TV 110 firmwareFirmware: Android KitKat 4.4.2Image file name: aml_upgrade_package.img Model: TV110 TV Box
Image file size: 282 MB
Platform: Amlogic S805