Shift Paddle Retrofit: Manual shifting reverts back to 'D' automatically

[HugoRS10]

First change to manual mode by pulling gear selector towards back. Then in it will say M1, M2... instead of D1, D2.. and it won't revert back to automatic.

I'm afraid that is for older models, 22.5 and on don't have the manual mode option.

We have P N R D and B and no M.