Cannot use old adobe password to authorize digital editions on new computer?

My old cmputer died and so I have to authorize Digital Editions on my new computer - but it won't let me use my previous email address and logon...does this mean that every time i get a new computer I need to create a new adobe password (WITH a different email address)? Not that I get new computers that often, but you never know when one might die! Now I have 2 adobe ids - one that i use for creative suite, and this new stupid one that i had to create to use Digital Editions. If this computer dies on me, it seems i will need to invent another email address and adobe id just to have the pleasure of using this free software. Am I getting this right?