HA 0.31: internal Z-Wave index is now appended to the end of all Z-Wave entity IDs

Before I update to HA .31, can someone explain the steps need to update what configuration files so that Z-Wave still works? It is just not clear to me what the process is.

Z-Wave will still work after the update but the entity ids will have changed, i.e. you will have to manually update your configuration.yaml and fix wherever you have used the ids.
A step by step guide has been written up in the linked post yesterday.

Thanks! That did the trick. The only thing I missed was fixing my groups.yaml file.