I still return for the question of the license Android and the Mrx

I would like explained clearly, because I speak French, I use a translator.

If I validated the code or the key of activation Android with the mrx.

I can change for a license IOS?
For used with an IPad or IPhone

I can deleted(eliminated) or deactivated the existing key Android?
Of Mrx which I possess
Well on I shall certainly be obliged to redo one other programming.
I wondered....
As soon as we associated a key with Mrx,
Is it transferable, with same Mrx?