The last thing you want to do is to change your ID.
It probably meant to change the ID associated with the new computer; ADE messages are often confusing, and sometimes just plain incorrect.
ADE may have associated an anonymous implicit ID with your new computer.
To fix:
- Get rid of any ID that ADE may have used on the new computer. ctrl-shift-D (cmd-shift-D if it is a Mac). Confirm any dialogs that come up.
- Restart ADE.
- Try again to associate ADE with your own original ID (the one assoicated with your email address). menu/Help/Authorize Computer on ADE2, or menu/Library/Authorize Computer if you are on the older and more reliable ADE1.7.2.