Is rekordbox for free when I have pioneer products ?

Hi.

I have some products from pioneer 

( 2cdj 350, djm 300.2 cdj 850, djm 900 nexus 2. and a oooold pioneer djm 600)

Now for the first time i have tried rekordbox. It was fun, I had a cd with a key for rekordbox but it dosent work ( to old ? )

How to get a valid key ? Have to pay for it ?

Have a gr8 day