How do I change the email address for my Webstarts account?

You can add additional email addresses to your Webstarts account that can be used as your acount log-in. Start by clicking the Settings tab from within your account dashboard. Under Login Email Information, add your new email address(es) in the New Email text box and click Add New Email. This will send a confirmation email to the email address you just added. You will then need to log-in to the email account and click on the confirmation link to confirm and add your new email as a secondary log-in email address.
You can also edit the Contact email address for your account in the same Account Settings area. Under where it says Contact Email Information, enter the new email address that you wish to use as your contact email and click Update Contact Email. This will update the contact email address used for your acount for things such as contact submission forms.