I have the option to actualization of iMovie, but I can`t no change the Apple ID, the e-mail its appearing I don`t use anymore, how may I delete that e-mail address?

Dear People,

I have the option to do the actualization of iMovie for my MacBook pro, but I can`t no download that because the Apple ID don`t let me change the e-mail address, there is an e-mail address that I don`t use anymore since long time a go, when I'm log in with my Apple ID, and I try to download the actualization, the system request again to log in, with the old e-mail address, and have no option to change the e-mail address for the right one, some body may help me?