Computer rework

After my hard disk crashed, i had to reset my Computer completly, everything new, but now i have the problem that i can't use my old account of adobe in adobe digital editions. So I can't move my old e-books anymore. Is there any oppertunity to reset my old account, so that I can use it again?

If i tried to authorize my Computer with my old account there came a error saying: "you can't authorize the same account on different computers"

At the Moment I use version 3.0.86137.