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It has been a while so don't judge me. Also I am sure I didn't re-upload.
Guessing, you can add your new account as a author to your resources, then remove your old account as an author of the resource.
Yes, this is really the only solution sadly. Name change 'is' possible, but it's a complete ass pain for anyone to do for you, so we say no. AFAIK only people that can do it have SQL access. Blame toady.