After reinstallation of Windows7 my pc authorazion of ADE 2.0 stoppes to work. I borrow ebooks from

I have borrowed ebooks from library already a year. Authorization is needed. When I reinstalled Windows 7 function of authorization stopped to work. Old book my own library still open, but I can not open URRLink from puplic library. How I can deleit my old broken ahtorizion and make new authorizion?