For the VMworld account, it is possible to change most information via the 'edit profile', but not the email.
To change the email, you have to open a ticket with VMworld support.
Here is info and link:
Updating Partner, Alumni, VCP status
After changing my email address, all info connected to the VMworld account about Partner, VCP, VMUG, and VCP status were gone (this is required to obtain e.g. Alumni discount). To update this info, another ticket has to be created. It took about one working day.
Here is info and link (same link as above):