I've bought a few books from google play that I want to put on my Kobo. I've downloaded ADE 4.5 and run the installer successfully but when I click on the app I get the message "Adobe digital editions app 4.5.app" can't be found. I've tried uninstalling and reinstalling. I've tried installing an older version but I can't get it to work. I've looked online but I can't find a resolution to this issue. I'm running OS X 10.11.6.