I have a windows 7 and using Adobe digital editions 2.0.1. I have downloaded books for years. I updated my ADE to 4.5 and the problems started. I have since been told to uninstall 4.5 and reinstall 2.0.1. I have. I am now getting this error E_AUTH_BAD_DEVICE_KEY_PKSC12 does anyone know what to do?