QUESTION: is there a replacement for the Zwave tweaker that works with the new architecture so you can set associations and change parameter values?
ANSWER: a community member has created a specialty edge driver, which acts as a zwave configuration tool. You use it just like you used the tweaker: you add the configuration tool to your account, download it to your own hub, then temporarily change the device to the configuration tool. Set your parameters and then change back to your every day driver.
Be aware that some people have reported that their routines using that device might be temporary disabled, or even deleted during the driver change, so be aware of that potential issue. The configuration tool is probably best used when you are first setting up a new device.