This article applies to: mBot, mBot Ranger, Starter, Ultimate, Ultimate 2.0
Devices required: PC (here we use windows); Makeblock robot kit (here we use mBot as an example; USB cable
Connect your Makeblock robot to mBlock 3.4.x.
Go to Connect->Reset Default Program->mBot, wait until it says Upload Finish.
Ps: reset button on the main board cannot get same effect as “reset default program”. The reset button only flashes the program which is uploaded last time.