I have used one of the Nook Readers for 5 years and the same version on ADE for 4, everything used to work. I upgraded to Win 10 and ADE still works opens files etc. However new downloaded files using Overdrive from Library will not open on the Nook. I receive an error stating "user not Activated" How do I fix this? The ADE is authorized as it has been for several years as well as the NOOK.