How to change my email address

Hi,

I registered launchpad a few years ago with my university email account. Since I left the university, the email does not work any more. My question is, is it possible to change my email address in launchpad. If it is, how?

I did some search in “launchpad answers“ and an article said email address could be changed with the following steps
“
* Go to your personal page
* In the righthand menu choose 'Edit Details'
* Then choose from the lower righthand menu 'E-mail Addresses'
”
But I did not find the last menu "E-mail Addresses" in my page.

Thank you