Newb Problems

Im trying to install Kodi 17 on my MXQ box. I uninstalled the previous version before hand but now I cannot install 17. I have tried downloading the apk via the browser but I get a message saying no apk found. I get the same when I downloaded the apk to a memory stick and used that in the MXQ box. Im completely lost, can anyone help? I also got a parsing error on one of my attempts??