Lost An Instaltion When Switch To a SSD Drive

my problem is this: I am working on the same computer.
He underwent upgrade to SSD and I have the product key point
is to develop a product that can be used of around-times
and because he used the code one pitch drive to finish my regulations product,
I wanted to know how I can use the code (if a special permit or some way)
for authentication without waste any assignment,All i need is that you give me back my instaltion (1) key time.

Thanks in advance, Doron.