Step by Step guide to How to Install Community Build from Zip file
Download ZIP FILE make sure your device does not unzip automatically, you need to keep the file as a zip do not extract. For example on a Mac you need to ensure that the 'Open Safe Files' button is unchecked in Safari general settings.
Save the file to a location you can find easily when you are prompted to later on in the install process.
Open Kodi ( This will not work with xbmc)