Firmware for 3d printer MBot Cube dual extruder

Please give a link to the firmware for the 3d printer MBot Cube Dual Extruder
I have problems with printing.

What sort of problems?

Extruder first layer normally prints, the second smears a lot of squeezes out the plastic.
In replicator G I did not find the parameter responsible for the speed of the supply of plastic.

I also unable to connect the 3D printer, dell printer error 016-302 helped me to do connect but so far its firmware isn’t upgraded.

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