I don't own a mx android box so the instructions to download add on's may be different from the firetv and firesticks I have...but you can do a google search for best kodi add on's for movies or tv shows and that would provide you with step by step instructions :)
i was just googling for Exodus as well, I've seen articles where it's states exodus on the subject like but no where in the article....that's the main one I use. It worked last night, I'll see how it goes tonight....I'm sure that one will be next :(