Download latest Android KitKat 4.4.2 stock firmware for Vido M11 Pro / YuanDao M11 Pro tablet from here or from here. Download previous firmware version from here. Download another Yuandao firmware from here.
Firmware image file: M11PRO-4.4-20150317-ZZ.img
Model： Vido M11 Pro / YuanDao M11 Pro tablet ZZ model
Image file size: 449 MB
Platform: Rockchip RK3288
Boot version: 2.15
FW version: 4.4.02
Build number:rk3288-eng 4.4.2 KOT49H eng.bob.20150317.171413 test-keys
SDK version: RK30_ANDROID4.4.2-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.