Can't open Encrypted DCP

[technogeek]

I created an Encrypted DCP on my System when I was running Yosemite.
I have now upgraded to EL Capitan and I cannot open this Encrypted DCP.
I did copy the config.xml file from the user/library/preferences/com.dcpomatic/2 to the new user library on my new boot drive.
Now I do still have the old Boot Drive if I have retrieve anything else but my understanding was that all I needed to do was copy over the config.xml and all my keys would be the same.

Here is the error message as a screen shot that I'm receiving which doesn't make sense because there were never any Subtitles in this DCP.

Is there anything else that I need to retrieve from the old boot drive in order to make this work.

Thanks

[technogeek]

Update.

I just made a new Encrypted DCP and when I "Add Folder" in DCP-O-Matic and then Add the KDM or DKDM via "Add Files(s)" for this machine I get the same error. I then cannot open the DCP.

This is really perplexing me.

Help and Thanks.

[carl]

Hi there, don't add the KDM with "Add file(s)..."; instead, right-click on the encrypted DCP in the list and choose "Add KDM..." Does that work any better?

[technogeek]

That will probably do the trick, I will give it a try when I get back to the office tomorrow.

How stupid of me, it has been at least 6 months since I've used it so I completely forgot that that was the way to do it.

Thanks