If you are on a recent snapshot, try
Are your devices unknown? You need to use a recent zwave snapshot.
If you don’t get anything from the binding, is it active? Check through karaf. Also make sure you only have one zwave binding installed…
Did you try cleaning the cache?
How did you install openHAB? Manually, repo, openHABian???
There are many ways how to do the upgrading and downgrading. For the Milestones you need to switch to the testing repo (if on a repo install), for the stable you need to switch to the stable repo:
You need to provide more information, I can’t list the whole docs section 
Always make sure to have a backup before changing anything: