Hello John,
Thank you for your question about changing your eBay ID. Did you create a completely different account, or just change your eBay ID within the same account?
If the latter, you can just go to BidSlammer Preferences at our site and follow the steps to re-authorize. It will detect the change and replace the eBay ID.
Please let us know if you have any other questions, or require other assistance. We are happy to help.
bidslammer