MRT Cloned Transponders

[sldmodels]

I bought a couple of Cloned transponders a while ago, and they're brilliant, no probs, but I think I must have selected the "wrong" number on my pt and ended up with a different number. I'm sure if I look then I can find the destructions, but from what I remember, they weren't all that clear on how to set them, so does anyone know how I can reset it back to "my" pt number?