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Yes, in a round about way. Go to the TSC web site and create a new member using the 'bad' email address. Login as that member and add the node(s), then logout.
Log back in as your regular user, the one with your correct email address, and select Merge Members from the top of the page. You will be prompted for your current password, which member you want to delete, and that members password.
The current password is for the user you are currently logged in as. The member to delete is the member you just created and added node(s) for. And finally, that members password.
The result of this operation is that the node(s) for the new member you created will be merged into your regular user account, and the new user will be deleted. These changes are immediate.