Sorry I just saw that too in the karaf console. I uninstalled the older version from the console and now the 2.5 version is starting. But sadly the switch still does not work. I’ve updated the log in the link.
Also I’am getting a strange error that a java class is not found, but I can see the class file in the jar file if I rename it to .zip:
Could not load implementation object class org.openhab.binding.zwave.discovery.ZWaveUsbSerialDiscoveryParticipant