Download Android Nougat 7.1.2 firmware for MX10 TV Box from here, here or here. Download previous firmware from here. Download Rockchip Driver Assistant v4.4 from here and download Rockchip Batch Tool v1.8 from here.
Archive: MX10 RKMC18.0 20171212 r1
Archive size: 761 MB
Model: MX10 TV Box 4GB RAM + 32GB ROM
Platform: Rockchip RK3328 / RK322H
Image name: MX10 RKMC18.0 20171212 r1.img
FW version: 7.1.00
Boot version: 2.44
Model number: MX10.00.d4
Build number: rk3328_box-userdebug 7.1.2 NHG47K eng.foxluo.20171212.114437 test-keys
SDK version: RK30_ANDROID7.1.2-SDK-v1.00.00
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.