Upgrading The Elastic Stack from 7.3 to 7.4

I am wanting to upgrade my 7.3 Elastic Stack to 7.4
But I'm not sure the best way to do it. I have a test 7.3 ELK system running on a Windows box I am going to experiment with before moving on the the production instances on Linux.
I do not see any 'upgrade' scripts, so do I unzip and copy over to existing dirs, saving off any configs so I can reapply?