You can update your email address in your account preferences, just mouse over the My Account tab and choose Acct. Preferences from the drop down. The email section is towards the bottom on the next page. As for using your account with your new eBay account, you will likely need to generate a new token once you have your new eBay Id set up. I can't recall the process, but its listed in the Auctiva FAQs or their support dept can help with directions. For changing your username for your Auctiva account, I haven't done this before but I think that can only be done by Auctiva. You would need to contact their support dept and they should be able to assist you with making that change!