Where is my product ID so I can buy 2xl ?

Hey Everyone, I am wanting to know how to find my product id of MPC 1000. I want to buy jjos2xl, and I am currently using jjos 3.16 free version. I checked MODE + pad 3 ( Save ) and it does not display any product ID. Help would be appreciated, Cheers

You need to be running the version you want to buy first then do the save to get the ID.