How to use SP Flashtool?

(sorry for the bad English) I've never used any flash tool, i received an educational tablet from school and it's too much restricted and i need to put it's original lock rom for remove the restricted government rom. The device is a Multilaser M8 4g model: ML_SO1V I watched some tutorials and i gonna use the multisync To install a non-functional ROM on the tablet, just to remove the government ROM and install one that works on the device using the Sp Flashtool.Can someone help me?