Mira Platinum dual valve remote control pairing issue

[Bobnic]

I have 2 Mira dual valve vision showers. The remote control.for the Vision model has been discontinued, so I bought a Mira Platinum dual controller, as they are compatible. The issue is that as I have 2 showers, I have somehow managed to pair the new remote control with the wrong shower! So I have one shower without a remote co trolley and one shower now has 2 remote controls paired to it!!! I've turned off the power to both (they are both on the same circuit and in bathrooms next door to each other), and then tried changing the frequency, but thus doesn't seem to help. Is there a way to reset the remote and ensure I c9nnect to the correct shower please?

Thanks in advance