Adobe Reader does not open pdf from Adobe Digital Editions

Hi!

I have purchased an ebook saved in Documents-My Digital Editions. I can read the book in Adobe Digital Editions but I do not like the scrolling function and I would thus would like to read the book in Adobe Acrobat Reader DC. However, the latter will not open the file. I get the message that something went wrong and that protection plug programme that is needed for this commando is not installed. Have the latest version of both programmes. Could anyone help? Thank you in advance!