Hi to install the Final Gear Kodi addon follow these instructions
Open Kodi
Select SYSTEM > File Manager
Select Add Source
Select None
Type the following EXACTLY http://matsbuilds.uk/goliath and select Done
Highlight the box underneath Enter a name for this media Source, type goliath & select OK
Go back to your Home Screen
Select SYSTEM
Select Add-Ons
Select Install from zip file
Select goliath
Select repository.Goliath.x.x.x.zip
Wait for Add-on enabled notification
Select Install from repository or Get Add-Ons on Helix
Select Goliaths Add-ons repository
Select Video Add-Ons
Select Final Gear
Select Install
Wait for Add-on enabled notification