I am getting the dread "Failed to connect with DDE Server" message.
However:
1. I never have tried to combine multiple files into one PDF
2. when I tried to edit the registry, it already had R19 in the appropriate spot.
3. No antivirus software was running (and Malwarebytes had never interfered with Adobe in the past)
4. I can't update Adobe Reader because I can't open it.
5. When I try to uninstall the program I get the DDE Server message.
Can anyone help me, please?