Since I downloaded Windows 10 from 7, I am unable to download ebooks thru DE 4.0. I reverted back to 7 and was unable to to download ebooks there as well (it had worked prior to upgrade). I upgraded again and am using 10. The program "Fulfills" but then states it is "Unable to Download. Error getting license. License server communication problem and then code. E_ADEPT_DOCUMENT_OPEN_ERROR. Help Please
I imagine you got an answer long ago, but just in case: running ADE as Administrator seems to fix this problem.