openvpn config

I have installed Kodi on my Amazon firestick. I have also installed openvpn addon to protect my connection. In the openvpn configuration in need to point to where openvpn is installed. As far as i know it is /usr/sbin/openvpn. Problem is, when i go to file manager, there is no usr folder or .kodi or .config folders. I have already enabled the file manager option to show hidden files. Someone please help. thanks.