If it's just a matter of changing Your mail address that's possible without making a new Adobe ID. Adobe have addressed this issue her: http://helpx.adobe.com/digital-publishing-suite/kb/changing-id-email.html
Your reply was helpful, but when I write a new e-mail address to replace the existing, I get the message that the new Adobe-id is not available. I am sure that I printed it correct and I tried two different e-mail addresses, but none of them worked. I wonder why not? Can you change it for me?
Strange. I changed my works mail address not long ago using that exact info. Adobe probably can help You if You contact customer service.