Setup for windows desktop, external SFTP storgae

Hi, confused newby here.
I installed nextcloud client for win 10, but when I run it, it only has a few settings visible - Version 2.5.1final (build 20181204).
I have a Centos 6 VPS hosted by Liquid Web - I want to use a SFTP account for my external storage.

I’ve been going in squircles trying to find how to set this up, please point me in the right direction?