Yep I have tried this procedure but no joy.
I cant get into the pairing mode to remove the other connected devices.

As i can see it, there is 3 possible things wrong:
1. the ULF is faulty and needs to be replaced.
2. the ULF is faulty and the software needs to be rest on it somehow.
3. the button/wiring to the ULF is faulty.

I would like to test option 3 by shorting out pairing button pins at the times needed to pair the device. I have been looking for a pinout of the ULF but at this stage had little success.

If this still fails I am trying to find out if the software can be reset. I have a K+DCAN USB cable and software to reset this if it is possible this way.

If this still doesnt work and nothing else is working i will have to buy a new/second hand module.