I don’t see any activity on lawrence-jeff on github so if Jeff is working on it it’s not committed yet.
I haven’t tested but I’m pretty sure you can still install my device handler and it will work as it did before. The problem is that SmartThings won’t know if you control the OpenGarage from the hardware button until SmartThings polls again. That’s the optimization that we needed a firmware change to fix. So, you can still use the current handler it just doesn’t update the garage door is open or closed for up to 5 minutes if you don’t do it through SmartThings.
It’s here. You don’t need the SmartApp. Just the device handler.