New to Kodi

I have a MXQPro 4k android box, came with its initial setup. It says on the box cpu is 64bit, i assume if i go to kodi.tv to update i should pick the 64 bit option, is this correct?
Secondly, i did update using kodi.tv , Android, using Arma32bit on one box and it installed fine, but there isn’t an option for connecting a bluetooth device. I bought iPazzPort bluetooth controller and now can’t use it. Advice please…

Thanks