PLEASE HELP LOST SERIAL KEY

so I got a new pc and the main reason I play mount and blade warband is for napoleon so how do I get my serial key back as I really want to play 

Where did you buy it ?

I have the the same problem. I have warband from "D2D" and i bought NW back in 2012.. The weird thing is there is no record of NW on my email account which doesnt make sense. I wonder is a dev can help me out and pm me. Im desperate to play!~

with D2D do you mean direct2drive?
Your key should still be there at their new website. (since the company was taken over)

I bought MB Warband on D2d but im not sure where i bought NW from.. The annoying thing is that the email confirmation is not in my gmail (which is my only email i use) but i for sure bought it and played a **** ton. I was even a recruit for the (Marins gard) or something like that. Anyways I just want the Devs or WHOEVER to re send me a email confirmation. Pleas HELP! PM me or something !!