I think you will have to use program called revive, that let you play oculus games with steamvr, but I don’t know if that will work with body tracking.
I don’t see why you would use older versions. For me everything works as should work and tutorials are still up to date. New versions only add more functions and fix bugs. And you know you dont have to make new account every 10 min if you are using free version? You can just restart program.