so confussed

kay i am new to this whole android box thing.. so here goes i will try and exspain everything so you all understand… lol
kay i own a MXQ pro 4k now lol stupid me reset the whole box and know my kodi is gone i have tried everything i went to the kodi site and have no idea what to down load and when i do it says its not compatible with my box… so i dont know what else to do to get it back.. now if anyone can help me out you will have to exsplain very easy how to do it … its like teaching a child lol so think android box and kodi for dummies.. please anyone i would love to learn how to update also so i do not have to pay between 30-60 dollars everytime kodi needs to be updated.. lol
thank you all in advance..
crissinda